Publications from OUS - Pediatric Rheumatology Research Group

155 publications found

Publications 2025

1. Hetland ML, Heiberg MS, Sokka-Isler T, Rudin A, Østergaard M, Haavardsholm E, Rutanen J, van Vollenhoven R, Grondal G, Ørnbjerg LM, Bøyesen P, Lampa J, Nurmohamed M, Gudbjornsson B, Uhlig T, Kononoff A, Lend K, Krabbe S, Olsen IC, Sexton J, Hørslev-Petersen K (2025)
   Treatment with methotrexate plus oral prednisolone versus triple therapy (methotrexate/sulfasalazine/hydroxychloroquine) plus intra-articular glucocorticoids in early rheumatoid arthritis: a prespecified nonrandomised subgroup analysis of clinical and radiographic data at 48 weeks from the NORD-STAR trial's conventional treatment arm
   Ann Rheum Dis (in press)
   DOI 10.1016/j.ard.2025.03.002, PubMed 40188008

Publications 2024

1. Bøyesen P, Kirkhus E (2024)
   Can whole-body MRI assessment replace clinical joint examination in assessing disease activity in children with juvenile idiopathic arthritis?
   Rheumatology (Oxford), 63 (12), 3201-3202
   DOI 10.1093/rheumatology/keae329, PubMed 38897666
2. Bøyesen P, Weiss P (2024)
   Paediatric rheumatic diseases: insights from the bench, imaging and trials
   Rheumatology (Oxford), 63 (SI2), SI107-SI109
   DOI 10.1093/rheumatology/keae355, PubMed 38976644
3. Moe SR, Haukeland H, Brunborg C, Botea A, Damjanic N, Wivestad GÅ, Øvreås H, Bøe T, Orre A, Garen T, Lilleby V, Provan SA, Molberg Ø, Lerang K (2024)
   Persisting mortality gap in systemic lupus erythematosus; a population-based study on juvenile- and adult-onset SLE in Norway 1999-2022
   Rheumatology (Oxford), 63 (8), 2109-2117
   DOI 10.1093/rheumatology/kead519, PubMed 37769251
4. Sande NK, Kirkhus E, Lilleby V, Tomterstad AH, Aga AB, Flatø B, Bøyesen P (2024)
   Validity of an ultrasonographic joint-specific scoring system in juvenile idiopathic arthritis: a cross-sectional study comparing ultrasound findings of synovitis with whole-body magnetic resonance imaging and clinical assessment
   RMD Open, 10 (1)
   DOI 10.1136/rmdopen-2023-003965, PubMed 38428979

Publications 2023

1. Berger SG, Witczak BN, Reiseter S, Schwartz T, Andersson H, Hetlevik SO, Berntsen KS, Sanner H, Lilleby V, Gunnarsson R, Molberg Ø, Sjaastad I, Stokke MK (2023)
   Cardiac dysfunction in mixed connective tissue disease: a nationwide observational study
   Rheumatol Int, 43 (6), 1055-1065
   DOI 10.1007/s00296-023-05308-3, PubMed 36933069
2. Collado P, Martire MV, Lanni S, De Lucia O, Balint P, Guillaume-Czitrom S, Hernandez-Diaz C, Sande NK, Magni-Manzoni S, Malattia C, Rossi-Semerano L, Roth J, Ting T, Vega-Fernandez P, Windschall D, D'Agostino MA, Naredo E, OMERACT Ultrasound Group (2023)
   OMERACT International Consensus for Ultrasound Definitions of Tenosynovitis in Juvenile Idiopathic Arthritis: Systematic Literature Review and Delphi Process
   Arthritis Care Res (Hoboken), 75 (11), 2277-2284
   DOI 10.1002/acr.25159, PubMed 37221153
3. Kim H, Saygin D, Douglas C, Wilkerson J, Erman B, Pistorio A, McGrath JA, Reed AM, Oddis CV, Bracaglia C, van Royen-Kerkhof A, Bica B, Dolezalova P, Ferriani VPL, Flato B, Bernard-Medina AG, Herlin T, Miller FW, Vencovsky J, Ruperto N, Aggarwal R, Rider LG, International Myositis Assessment and Clinical Studies Group (IMACS) and Paediatric Rheumatology INternational Trials Organization (PRINTO) (2023)
   Performance of the 2016 ACR-EULAR myositis response criteria in juvenile dermatomyositis therapeutic trials and consensus profiles
   Rheumatology (Oxford), 62 (11), 3680-3689
   DOI 10.1093/rheumatology/kead111, PubMed 36929918
4. Marstein HS, Witczak BN, Godang K, Olarescu NC, Schwartz T, Flatø B, Molberg Ø, Bollerslev J, Sjaastad I, Sanner H (2023)
   Adipokine profile in long-term juvenile dermatomyositis, and associations with adipose tissue distribution and cardiac function: a cross-sectional study
   RMD Open, 9 (1)
   DOI 10.1136/rmdopen-2022-002815, PubMed 36828644
5. Marstein HS, Witczak BN, Godang K, Schwartz T, Flatø B, Bollerslev J, Sjaastad I, Sanner H (2023)
   Adipose tissue distribution is associated with cardio-metabolic alterations in adult patients with juvenile-onset dermatomyositis
   Rheumatology (Oxford), 62 (SI2), SI196-SI204
   DOI 10.1093/rheumatology/keac293, PubMed 35575380
6. Sande NK, Lilleby V, Aga AB, Kirkhus E, Flatø B, Bøyesen P (2023)
   Associations between power Doppler ultrasound findings and B-mode synovitis and clinical arthritis in juvenile idiopathic arthritis using a standardised scanning approach and scoring system
   RMD Open, 9 (1)
   DOI 10.1136/rmdopen-2022-002937, PubMed 36963783
7. Østergaard M, van Vollenhoven RF, Rudin A, Hetland ML, Heiberg MS, Nordström DC, Nurmohamed MT, Gudbjornsson B, Ørnbjerg LM, Bøyesen P, Lend K, Hørslev-Petersen K, Uhlig T, Sokka T, Grondal G, Krabbe S, Lindqvist J, Gjertsson I, Glinatsi D, Kapetanovic MC, Aga AB, Faustini F, Parmanne P, Lorenzen T, Giovanni C et al. (2023)
   Certolizumab pegol, abatacept, tocilizumab or active conventional treatment in early rheumatoid arthritis: 48-week clinical and radiographic results of the investigator-initiated randomised controlled NORD-STAR trial
   Ann Rheum Dis, 82 (10), 1286-1295
   DOI 10.1136/ard-2023-224116, PubMed 37423647

Publications 2022

1. Bardan I, Fagerli KM, Sexton J, Kvien TK, Bakland G, Mielnik P, Hu Y, Lien G, Flatø B, Molberg Ø, Kristianslund EK, Aga AB (2022)
   Treatment Response to Tumor Necrosis Factor Inhibitors and Methotrexate Monotherapy in Adults With Juvenile Idiopathic Arthritis: Data From NOR-DMARD
   J Rheumatol, 50 (4), 538-547
   DOI 10.3899/jrheum.220645, PubMed 36379571
2. Felbo SK, Wiell C, Østergaard M, Poggenborg RP, Bøyesen P, Hammer HB, Boonen A, Pedersen SJ, Sørensen IJ, Madsen OR, Slot O, Møller JM, Szkudlarek M, Terslev L (2022)
   Do tender joints in active psoriatic arthritis reflect inflammation assessed by ultrasound and magnetic resonance imaging?
   Rheumatology (Oxford), 61 (2), 723-733
   DOI 10.1093/rheumatology/keab384, PubMed 33895799
3. Li J, Li YR, Glessner JT, Yang J, March ME, Kao C, Vaccaro CN, Bradfield JP, Li J, Mentch FD, Qu HQ, Qi X, Chang X, Hou C, Abrams DJ, Qiu H, Wei Z, Connolly JJ, Wang F, Snyder J, Flatø B, Thompson SD, Langefeld CD, Lie BA, Munro JE et al. (2022)
   Identification of Novel Loci Shared by Juvenile Idiopathic Arthritis Subtypes Through Integrative Genetic Analysis
   Arthritis Rheumatol, 74 (8), 1420-1429
   DOI 10.1002/art.42129, PubMed 35347896
4. Tollisen A, Selvaag AM, Aasland A, Ingebrigtsen T, Sagen J, Lerdal A, Flatø B (2022)
   Personally Generated Quality of Life Outcomes in Adults With Juvenile Idiopathic Arthritis
   J Rheumatol, 49 (10), 1138-1145
   DOI 10.3899/jrheum.211245, PubMed 35569834
5. von Brandis E, Jenssen HB, Avenarius DFM, Bjørnerud A, Flatø B, Tomterstad AH, Lilleby V, Rosendahl K, Sakinis T, Zadig PKK, Müller LO (2022)
   Automated segmentation of magnetic resonance bone marrow signal: a feasibility study
   Pediatr Radiol, 52 (6), 1104-1114
   DOI 10.1007/s00247-021-05270-x, PubMed 35107593
6. von Brandis E, Jenssen HB, Avenarius DFM, Bjørnerud A, Flatø B, Tomterstad AH, Lilleby V, Rosendahl K, Sakinis T, Zadig PKK, Müller LO (2022)
   Correction to: Automated segmentation of magnetic resonance bone marrow signal: a feasibility study
   Pediatr Radiol, 52 (6), 1196
   DOI 10.1007/s00247-022-05315-9, PubMed 35192023
7. von Brandis E, Zadig PK, Avenarius DFM, Flatø B, Kristian Knudsen P, Lilleby V, Nguyen B, Rosendahl K, Ording Müller LS (2022)
   Whole body magnetic resonance imaging in healthy children and adolescents. Bone marrow appearances of the axial skeleton
   Eur J Radiol, 154, 110425
   DOI 10.1016/j.ejrad.2022.110425, PubMed 35843014
8. Witczak BN, Bollerslev J, Godang K, Schwartz T, Flatø B, Molberg Ø, Sjaastad I, Sanner H (2022)
   Body composition in long-standing juvenile dermatomyositis: associations with disease activity, muscle strength and cardiometabolic measures
   Rheumatology (Oxford), 61 (7), 2959-2968
   DOI 10.1093/rheumatology/keab805, PubMed 34718443
9. Witczak BN, Schwartz T, Barth Z, Taraldsrud E, Lund MB, Aaløkken TM, Flatø B, Sjaastad I, Sanner H (2022)
   Associations between cardiac and pulmonary involvement in patients with juvenile dermatomyositis-a cross-sectional study
   Rheumatol Int, 42 (7), 1213-1220
   DOI 10.1007/s00296-021-05071-3, PubMed 34984516
10. Zadig PK, von Brandis E, Flatø B, Ording Müller LS, Nordal EB, de Horatio LT, Rosendahl K, Avenarius DFM (2022)
    Whole body magnetic resonance imaging in healthy children and adolescents: Bone marrow appearances of the appendicular skeleton
    Eur J Radiol, 153, 110365
    DOI 10.1016/j.ejrad.2022.110365, PubMed 35617871

Publications 2021

1. Hu Y, Rojahn AE, Flato B (2021)
   Multiorgan inflammatory syndrome in children and adolescents after SARS-CoV-2 infection
   Tidsskr. Nor. Laegeforen., 141 (14), 1358-1361
2. Hu Y, Rojahn AE, Flatø B (2021)
   [Multisystem inflammatory syndrome in children and adolescents after infection with SARS-CoV-2]
   Tidsskr Nor Laegeforen, 141 (2021-14)
   DOI 10.4045/tidsskr.20.1040, PubMed 34641663
3. Marstein HS, Godang K, Flatø B, Sjaastad I, Bollerslev J, Sanner H (2021)
   Bone mineral density and explanatory factors in children and adults with juvenile dermatomyositis at long term follow-up; a cross sectional study
   Pediatr Rheumatol Online J, 19 (1), 56
   DOI 10.1186/s12969-021-00543-z, PubMed 33902632
4. Sande NK, Bøyesen P, Aga AB, Hammer HB, Flatø B, Roth J, Lilleby V (2021)
   Development and reliability of a novel ultrasonographic joint-specific scoring system for synovitis with reference atlas for patients with juvenile idiopathic arthritis
   RMD Open, 7 (2)
   DOI 10.1136/rmdopen-2021-001581, PubMed 33883255
5. Tollisen A, Flatø B, Selvaag AM, Aasland A, Ingebrigtsen T, Sagen J, Lerdal A (2021)
   Treatment Satisfaction With and Adherence to Disease-Modifying Antirheumatic Drugs in Adult Patients With Juvenile Idiopathic Arthritis
   Arthritis Care Res (Hoboken), 73 (2), 221-231
   DOI 10.1002/acr.24113, PubMed 31758669

Publications 2020

1. Berntsen KS, Raastad T, Marstein H, Kirkhus E, Merckoll E, Cumming KT, Flatø B, Sjaastad I, Sanner H (2020)
   Functional and Structural Adaptations of Skeletal Muscle in Long-Term Juvenile Dermatomyositis: A Controlled Cross-Sectional Study
   Arthritis Rheumatol, 72 (5), 837-848
   DOI 10.1002/art.41174, PubMed 31746550
2. de Jesus AA, Hou Y, Brooks S, Malle L, Biancotto A, Huang Y, Calvo KR, Marrero B, Moir S, Oler AJ, Deng Z, Montealegre Sanchez GA, Ahmed A, Allenspach E, Arabshahi B, Behrens E, Benseler S, Bezrodnik L, Bout-Tabaku S, Brescia AC, Brown D, Burnham JM, Caldirola MS, Carrasco R, Chan AY et al. (2020)
   Distinct interferon signatures and cytokine patterns define additional systemic autoinflammatory diseases
   J Clin Invest, 130 (4), 1669-1682
   DOI 10.1172/JCI129301, PubMed 31874111
3. Frid P, Augdal TA, Larheim TA, Halbig J, Rypdal V, Songstad NT, Rosén A, Tylleskär KB, Berstad JR, Flatø B, Stoustrup P, Rosendahl K, Kirkhus E, Nordal E (2020)
   Efficacy and safety of intraarticular corticosteroid injections in adolescents with juvenile idiopathic arthritis in the temporomandibular joint: a Norwegian 2-year prospective multicenter pilot study
   Pediatr Rheumatol Online J, 18 (1), 75
   DOI 10.1186/s12969-020-00464-3, PubMed 32998740
4. Frid P, Baraniya D, Halbig J, Rypdal V, Songstad NT, Rosèn A, Berstad JR, Flatø B, Alakwaa F, Gil EG, Cetrelli L, Chen T, Al-Hebshi NN, Nordal E, Al-Haroni M (2020)
   Salivary Oral Microbiome of Children With Juvenile Idiopathic Arthritis: A Norwegian Cross-Sectional Study
   Front Cell Infect Microbiol, 10, 602239
   DOI 10.3389/fcimb.2020.602239, PubMed 33251163
5. Malattia C, Ruperto N, Pederzoli S, Palmisani E, Pistorio A, Wouters C, Dolezalova P, Flato B, Garay S, Giancane G, Wells C, Douglass W, Brunner HI, De Benedetti F, Ravelli A, Paediatric Rheumatology International Trials Organisation (PRINTO) and the Pediatric Rheumatology Collaborative Study Group (PRCSG) (2020)
   Tocilizumab may slow radiographic progression in patients with systemic or polyarticular-course juvenile idiopathic arthritis: post hoc radiographic analysis from two randomized controlled trials
   Arthritis Res Ther, 22 (1), 211
   DOI 10.1186/s13075-020-02303-y, PubMed 32912276
6. Marstein H, Schwartz T, Aaløkken TM, Lund MB, Flatø B, Sjaastad I, Sanner H (2020)
   Novel associations between cytokines and pulmonary involvement in juvenile dermatomyositis - a cross-sectional study of long-term disease
   Rheumatology (Oxford), 59 (8), 1862-1870
   DOI 10.1093/rheumatology/kez531, PubMed 31740970

Publications 2019

1. Barth Z, Schwartz T, Flatø B, Aaløkken TM, Koller A, Lund MB, Sjaastad I, Sanner H (2019)
   Association Between Nailfold Capillary Density and Pulmonary and Cardiac Involvement in Medium to Longstanding Juvenile Dermatomyositis
   Arthritis Care Res (Hoboken), 71 (4), 492-497
   DOI 10.1002/acr.23687, PubMed 29953739
2. Berntsen KS, Edvardsen E, Hansen BH, Flatø B, Sjaastad I, Sanner H (2019)
   Cardiorespiratory fitness in long-term juvenile dermatomyositis: a controlled, cross-sectional study of active/inactive disease
   Rheumatology (Oxford), 58 (3), 492-501
   DOI 10.1093/rheumatology/key342, PubMed 30508195
3. Consolaro A, Giancane G, Alongi A, van Dijkhuizen EHP, Aggarwal A, Al-Mayouf SM, Bovis F, De Inocencio J, Demirkaya E, Flato B, Foell D, Garay SM, Lazăr C, Lovell DJ, Montobbio C, Miettunen P, Mihaylova D, Nielsen S, Orban I, Rumba-Rozenfelde I, Magalhães CS, Shafaie N, Susic G, Trachana M, Wulffraat N et al. (2019)
   Phenotypic variability and disparities in treatment and outcomes of childhood arthritis throughout the world: an observational cohort study
   Lancet Child Adolesc Health, 3 (4), 255-263
   DOI 10.1016/S2352-4642(19)30027-6, PubMed 30819662
4. Fluge Ø, Rekeland IG, Lien K, Thürmer H, Borchgrevink PC, Schäfer C, Sørland K, Aßmus J, Ktoridou-Valen I, Herder I, Gotaas ME, Kvammen Ø, Baranowska KA, Bohnen LMLJ, Martinsen SS, Lonar AE, Solvang AH, Gya AES, Bruland O, Risa K, Alme K, Dahl O, Mella O (2019)
   B-Lymphocyte Depletion in Patients With Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: A Randomized, Double-Blind, Placebo-Controlled Trial
   Ann Intern Med, 170 (9), 585-593
   DOI 10.7326/M18-1451, PubMed 30934066
5. Hammenfors DS, Valim V, Bica BERG, Pasoto SG, Lilleby V, Nieto-González JC, Silva CA, Mossel E, Pereira RMR, Coelho A, Bootsma H, Thatayatikom A, Brun JG, Jonsson MV (2019)
   Juvenile Sjögren's Syndrome: Clinical Characteristics With Focus on Salivary Gland Ultrasonography
   Arthritis Care Res (Hoboken), 72 (1), 78-87
   DOI 10.1002/acr.23839, PubMed 30697959
6. Skagen K, Hetlevik SO, Zamani M, Lilleby V, Skjelland M (2019)
   Preclinical Carotid Atherosclerosis in Patients With Juvenile-Onset Mixed Connective Tissue Disease
   J Stroke Cerebrovasc Dis, 28 (5), 1295-1301
   DOI 10.1016/j.jstrokecerebrovasdis.2019.01.027, PubMed 30772156
7. Skjelland M, Zamani M, Hetlevik S, Lilleby V, Halvorsen B, Skagen K (2019)
   Increased Endothelial Activation in Patients with Mixed Connective Tissue Disease
   J Stroke Cerebrovasc Dis, 29 (2), 104563
   DOI 10.1016/j.jstrokecerebrovasdis.2019.104563, PubMed 31831329
8. Tollisen A, Selvaag AM, Aasland A, Lerdal A, Flatø B (2019)
   Longitudinal Health Status from Early Disease to Adulthood and Associated Prognostic Factors in Juvenile Idiopathic Arthritis
   J Rheumatol, 46 (10), 1335-1344
   DOI 10.3899/jrheum.180948, PubMed 30877211
9. Witczak BN, Hetlevik SO, Sanner H, Barth Z, Schwartz T, Flatø B, Lilleby V, Sjaastad I (2019)
   Effect on Cardiac Function of Longstanding Juvenile-onset Mixed Connective Tissue Disease: A Controlled Study
   J Rheumatol, 46 (7), 739-747
   DOI 10.3899/jrheum.180526, PubMed 30877222

Publications 2018

1. Aulie HA, Estensen ME, Selvaag AM, Lilleby V, Flatø B, Aakhus S (2018)
   Arterial properties in adults with long-lasting active juvenile idiopathic arthritis compared to healthy controls
   Pediatr Rheumatol Online J, 16 (1), 85
   DOI 10.1186/s12969-018-0302-5, PubMed 30594204
2. Barth Z, Witczak BN, Flatø B, Koller A, Sjaastad I, Sanner H (2018)
   Assessment of Microvascular Abnormalities by Nailfold Capillaroscopy in Juvenile Dermatomyositis After Medium- to Long-Term Followup
   Arthritis Care Res (Hoboken), 70 (5), 768-776
   DOI 10.1002/acr.23338, PubMed 28805016
3. Flato B, Rygg M, Nordal EB, Røisland M, Ødegård HB, Hoftun GB, Songstad NT, Consolaro A, Bovis F, Ruperto N, Paediatric Rheumatology International Trials Organisation (PRINTO) (2018)
   The Norwegian version of the Juvenile Arthritis Multidimensional Assessment Report (JAMAR)
   Rheumatol Int, 38 (Suppl 1), 291-298
   DOI 10.1007/s00296-018-3963-y, PubMed 29637327
4. Hetlevik SO, Flatø B, Aaløkken TM, Lund MB, Reiseter S, Mynarek GK, Nordal E, Rygg M, Lilleby V (2018)
   Pulmonary Manifestations and Progression of Lung Disease in Juvenile-onset Mixed Connective Tissue Disease
   J Rheumatol, 46 (1), 93-100
   DOI 10.3899/jrheum.180019, PubMed 30068767
5. Tollisen A, Selvaag AM, Aulie HA, Lilleby V, Aasland A, Lerdal A, Flatø B (2018)
   Physical Functioning, Pain, and Health-Related Quality of Life in Adults With Juvenile Idiopathic Arthritis: A Longitudinal 30-Year Followup Study
   Arthritis Care Res (Hoboken), 70 (5), 741-749
   DOI 10.1002/acr.23327, PubMed 28732134

Publications 2017

1. Augestad L, Hammarstrom C, Flato B, Bjerre A (2017)
   Renal failure of systemic vasculitis in children
   Tidsskr. Nor. Laegeforen., 137 (19), 1507-1511
2. Augestad L, Hammarström C, Flatø B, Bjerre A (2017)
   Renal involvement in paediatric systemic vasculitis
   Tidsskr Nor Laegeforen, 137 (19)
   DOI 10.4045/tidsskr.16.0592, PubMed 29043736
3. Berntsen KS, Tollisen A, Schwartz T, Kirkhus E, Aaløkken TM, Lund MB, Flatø B, Sjaastad I, Sanner H (2017)
   Submaximal Exercise Capacity in Juvenile Dermatomyositis after Longterm Disease: The Contribution of Muscle, Lung, and Heart Involvement
   J Rheumatol, 44 (6), 827-834
   DOI 10.3899/jrheum.160997, PubMed 28365577
4. Frid P, Nordal E, Bovis F, Giancane G, Larheim TA, Rygg M, Pires Marafon D, De Angelis D, Palmisani E, Murray KJ, Oliveira S, Simonini G, Corona F, Davidson J, Foster H, Steenks MH, Flato B, Zulian F, Baildam E, Saurenmann RK, Lahdenne P, Ravelli A, Martini A, Pistorio A, Ruperto N et al. (2017)
   Temporomandibular Joint Involvement in Association With Quality of Life, Disability, and High Disease Activity in Juvenile Idiopathic Arthritis
   Arthritis Care Res (Hoboken), 69 (5), 677-686
   DOI 10.1002/acr.23003, PubMed 27564918
5. Reiseter S, Gunnarsson R, Corander J, Haydon J, Lund MB, Aaløkken TM, Taraldsrud E, Hetlevik SO, Molberg Ø (2017)
   Disease evolution in mixed connective tissue disease: results from a long-term nationwide prospective cohort study
   Arthritis Res Ther, 19 (1), 284
   DOI 10.1186/s13075-017-1494-7, PubMed 29268795
6. Roth J, Ravagnani V, Backhaus M, Balint P, Bruns A, Bruyn GA, Collado P, De la Cruz L, Guillaume-Czitrom S, Herlin T, Hernandez C, Iagnocco A, Jousse-Joulin S, Lanni S, Lilleby V, Malattia C, Magni-Manzoni S, Modesto C, Rodriguez A, Nieto JC, Ohrndorf S, Rossi-Semerano L, Selvaag AM, Swen N, Ting TV et al. (2017)
   Preliminary Definitions for the Sonographic Features of Synovitis in Children
   Arthritis Care Res (Hoboken), 69 (8), 1217-1223
   DOI 10.1002/acr.23130, PubMed 27748074
7. Selvaag AM, Kirkhus E, Törnqvist L, Lilleby V, Aulie HA, Flatø B (2017)
   Radiographic damage in hands and wrists of patients with juvenile idiopathic arthritis after 29 years of disease duration
   Pediatr Rheumatol Online J, 15 (1), 20
   DOI 10.1186/s12969-017-0151-7, PubMed 28399930

Publications 2016

1. Anderson JH, Anderson KR, Aulie HA, Crowson CS, Mason TG, Ardoin SP, Reed AM, Flatø B (2016)
   Juvenile idiopathic arthritis and future risk for cardiovascular disease: a multicenter study
   Scand J Rheumatol, 45 (4), 299-303
   DOI 10.3109/03009742.2015.1126345, PubMed 26854592
2. Benjaminsen E, Reigstad A, Cengija V, Lilleby V, Carlsson M (2016)
   Stroke as the Sole Manifestation of Takayasu Arteritis in a 15-Year-Old Boy with Latent Tuberculosis
   Case Rep Neurol Med, 2016, 8736248
   DOI 10.1155/2016/8736248, PubMed 27965905
3. Constantin T, Foeldvari I, Vojinovic J, Horneff G, Burgos-Vargas R, Nikishina I, Akikusa JD, Avcin T, Chaitow J, Koskova E, Lauwerys BR, Calvo Penades I, Flato B, Gamir ML, Huppertz HI, Jaller Raad JJ, Jarosova K, Anton J, Macku M, Otero Escalante WJ, Rutkowska-Sak L, Trauzeddel R, Velez-Sanchez PJ, Wouters C, Wajdula J et al. (2016)
   Two-year Efficacy and Safety of Etanercept in Pediatric Patients with Extended Oligoarthritis, Enthesitis-related Arthritis, or Psoriatic Arthritis
   J Rheumatol, 43 (4), 816-24
   DOI 10.3899/jrheum.150430, PubMed 26932344
4. Evensen K, Aulie HA, Rønning OM, Flatø B, Russell D (2016)
   Carotid Atherosclerosis in Adult Patients with Persistently Active Juvenile Idiopathic Arthritis Compared with Healthy Controls
   J Rheumatol, 43 (4), 810-5
   DOI 10.3899/jrheum.150499, PubMed 26879363
5. Finkel TH, Li J, Wei Z, Wang W, Zhang H, Behrens EM, Reuschel EL, Limou S, Wise C, Punaro M, Becker ML, Munro JE, Flatø B, Førre Ø, Thompson SD, Langefeld CD, Glass DN, Glessner JT, Kim CE, Frackelton E, Shivers DK, Thomas KA, Chiavacci RM, Hou C, Xu K et al. (2016)
   Variants in CXCR4 associate with juvenile idiopathic arthritis susceptibility
   BMC Med Genet, 17, 24
   DOI 10.1186/s12881-016-0285-3, PubMed 27005825
6. Gunnarsson R, Hetlevik SO, Lilleby V, Molberg Ø (2016)
   Mixed connective tissue disease
   Best Pract Res Clin Rheumatol, 30 (1), 95-111
   DOI 10.1016/j.berh.2016.03.002, PubMed 27421219
7. Hetlevik SO, Flatø B, Rygg M, Nordal EB, Brunborg C, Hetland H, Lilleby V (2016)
   Long-term outcome in juvenile-onset mixed connective tissue disease: a nationwide Norwegian study
   Ann Rheum Dis, 76 (1), 159-165
   DOI 10.1136/annrheumdis-2016-209522, PubMed 27283334
8. Kirkhus E, Gunderson RB, Smith HJ, Flatø B, Hetlevik SO, Larheim TA, Arvidsson LZ (2016)
   Temporomandibular joint involvement in childhood arthritis: comparison of ultrasonography-assessed capsular width and MRI-assessed synovitis
   Dentomaxillofac Radiol, 45 (8), 20160195
   DOI 10.1259/dmfr.20160195, PubMed 27383060
9. Strand EB, Lillestol K, Jason LA, Tveito K, Diep LM, Valla SS, Sunnquist M, Helland IB, Herder I, Dammen T (2016)
   Comparing the DePaul Symptom Questionnaire with physician assessments: a preliminary study
   FATIGUE, 4 (1), 52-62
   DOI 10.1080/21641846.2015.1126026
10. Stray-Pedersen A, Sorte HS, Samarakoon P, Gambin T, Chinn IK, Coban Akdemir ZH, Erichsen HC, Forbes LR, Gu S, Yuan B, Jhangiani SN, Muzny DM, Rødningen OK, Sheng Y, Nicholas SK, Noroski LM, Seeborg FO, Davis CM, Canter DL, Mace EM, Vece TJ, Allen CE, Abhyankar HA, Boone PM, Beck CR et al. (2016)
    Primary immunodeficiency diseases: Genomic approaches delineate heterogeneous Mendelian disorders
    J Allergy Clin Immunol, 139 (1), 232-245
    DOI 10.1016/j.jaci.2016.05.042, PubMed 27577878

Publications 2015

1. Aulie HA, Estensen ME, Selvaag AM, Lilleby V, Murbraech K, Flatø B, Aakhus S (2015)
   Cardiac Function in Adult Patients with Juvenile Idiopathic Arthritis
   J Rheumatol, 42 (9), 1716-23
   DOI 10.3899/jrheum.141351, PubMed 26178287
2. Barth Z, Nomeland Witczak B, Schwartz T, Gjesdal K, Flatø B, Koller A, Sanner H, Sjaastad I (2015)
   In juvenile dermatomyositis, heart rate variability is reduced, and associated with both cardiac dysfunction and markers of inflammation: a cross-sectional study median 13.5 years after symptom onset
   Rheumatology (Oxford), 55 (3), 535-43
   DOI 10.1093/rheumatology/kev376, PubMed 26500284
3. Chiaroni-Clarke RC, Li YR, Munro JE, Chavez RA, Scurrah KJ, Pezic A, Akikusa JD, Allen RC, Piper SE, Becker ML, Thompson SD, Lie BA, Flato B, Forre O, Punaro M, Wise C, Saffery R, Finkel TH, Hakonarson H, Ponsonby AL, Ellis JA (2015)
   The association of PTPN22 rs2476601 with juvenile idiopathic arthritis is specific to females
   Genes Immun, 16 (7), 495-8
   DOI 10.1038/gene.2015.32, PubMed 26291515
4. Glinatsi D, Lillegraven S, Haavardsholm EA, Eshed I, Conaghan PG, Peterfy C, Gandjbakhch F, Bird P, Bøyesen P, Døhn UM, Genant HK, Østergaard M (2015)
   Validation of the OMERACT Magnetic Resonance Imaging Joint Space Narrowing Score for the Wrist in a Multireader Longitudinal Trial
   J Rheumatol, 42 (12), 2480-5
   DOI 10.3899/jrheum.141009, PubMed 25684773
5. Johnsson A, Flatø B, Knudsen PK, Lilleby V (2015)
   Clinical outcome in a Norwegian cohort of patients with chronic recurrent multifocal osteomyelitis
   Scand J Rheumatol, 44 (6), 513-4
   DOI 10.3109/03009742.2015.1055514, PubMed 26312400
6. Kirkhus E, Arvidsson LZ, Smith HJ, Flatø B, Hetlevik SO, Larheim TA (2015)
   Disk abnormality coexists with any degree of synovial and osseous abnormality in the temporomandibular joints of children with juvenile idiopathic arthritis
   Pediatr Radiol, 46 (3), 331-41
   DOI 10.1007/s00247-015-3493-7, PubMed 26637998
7. Li YR, Li J, Zhao SD, Bradfield JP, Mentch FD, Maggadottir SM, Hou C, Abrams DJ, Chang D, Gao F, Guo Y, Wei Z, Connolly JJ, Cardinale CJ, Bakay M, Glessner JT, Li D, Kao C, Thomas KA, Qiu H, Chiavacci RM, Kim CE, Wang F, Snyder J, Richie MD et al. (2015)
   Meta-analysis of shared genetic architecture across ten pediatric autoimmune diseases
   Nat Med, 21 (9), 1018-27
   DOI 10.1038/nm.3933, PubMed 26301688
8. Li YR, Zhao SD, Li J, Bradfield JP, Mohebnasab M, Steel L, Kobie J, Abrams DJ, Mentch FD, Glessner JT, Guo Y, Wei Z, Connolly JJ, Cardinale CJ, Bakay M, Li D, Maggadottir SM, Thomas KA, Qui H, Chiavacci RM, Kim CE, Wang F, Snyder J, Flatø B, Førre Ø et al. (2015)
   Genetic sharing and heritability of paediatric age of onset autoimmune diseases
   Nat Commun, 6, 8442
   DOI 10.1038/ncomms9442, PubMed 26450413
9. Ruperto N, Pistorio A, Oliveira S, Zulian F, Cuttica R, Ravelli A, Fischbach M, Magnusson B, Sterba G, Avcin T, Brochard K, Corona F, Dressler F, Gerloni V, Apaz MT, Bracaglia C, Cespedes-Cruz A, Cimaz R, Couillault G, Joos R, Quartier P, Russo R, Tardieu M, Wulffraat N, Bica B et al. (2015)
   Prednisone versus prednisone plus ciclosporin versus prednisone plus methotrexate in new-onset juvenile dermatomyositis: a randomised trial
   Lancet, 387 (10019), 671-678
   DOI 10.1016/S0140-6736(15)01021-1, PubMed 26645190

Publications 2014

1. Aulie HA, Selvaag AM, Günther A, Lilleby V, Molberg Ø, Hartmann A, Holdaas H, Flatø B (2014)
   Arterial haemodynamics and coronary artery calcification in adult patients with juvenile idiopathic arthritis
   Ann Rheum Dis, 74 (8), 1515-21
   DOI 10.1136/annrheumdis-2013-204804, PubMed 24695010
2. Ellis JA, Scurrah KJ, Li YR, Ponsonby AL, Chavez RA, Pezic A, Dwyer T, Akikusa JD, Allen RC, Becker ML, Thompson SD, Lie BA, Flatø B, Førre O, Punaro M, Wise C, Finkel TH, Hakonarson H, Munro JE (2014)
   Epistasis amongst PTPN2 and genes of the vitamin D pathway contributes to risk of juvenile idiopathic arthritis
   J Steroid Biochem Mol Biol, 145, 113-20
   DOI 10.1016/j.jsbmb.2014.10.012, PubMed 25460303
3. Lilleby V, Haydon J, Sanner H, Krossness BK, Ringstad G, Flatø B (2014)
   Severe macrophage activation syndrome and central nervous system involvement in juvenile dermatomyositis
   Scand J Rheumatol, 43 (2), 171-3
   DOI 10.3109/03009742.2013.863968, PubMed 24588361
4. Sanner H, Schwartz T, Flatø B, Vistnes M, Christensen G, Sjaastad I (2014)
   Increased levels of eotaxin and MCP-1 in juvenile dermatomyositis median 16.8 years after disease onset; associations with disease activity, duration and organ damage
   PLoS One, 9 (3), e92171
   DOI 10.1371/journal.pone.0092171, PubMed 24647150
5. Sanner H, Sjaastad I, Flatø B (2014)
   Disease activity and prognostic factors in juvenile dermatomyositis: a long-term follow-up study applying the Paediatric Rheumatology International Trials Organization criteria for inactive disease and the myositis disease activity assessment tool
   Rheumatology (Oxford), 53 (9), 1578-85
   DOI 10.1093/rheumatology/keu146, PubMed 24692575
6. Schwartz T, Sjaastad I, Flatø B, Vistnes M, Christensen G, Sanner H (2014)
   In active juvenile dermatomyositis, elevated eotaxin and MCP-1 and cholesterol levels in the upper normal range are associated with cardiac dysfunction
   Rheumatology (Oxford), 53 (12), 2214-22
   DOI 10.1093/rheumatology/keu256, PubMed 24996906
7. Selvaag AM, Aulie HA, Lilleby V, Flatø B (2014)
   Disease progression into adulthood and predictors of long-term active disease in juvenile idiopathic arthritis
   Ann Rheum Dis, 75 (1), 190-5
   DOI 10.1136/annrheumdis-2014-206034, PubMed 25362042
8. Ørnbjerg LM, Østergaard M, Bøyesen P, Krogh NS, Thormann A, Tarp U, Poulsen UE, Espesen J, Schlemmer A, Graudal N, Kollerup G, Jensen DV, Madsen OR, Glintborg B, Christensen T, Lindegaard H, Bøhme W, Hansen A, Andersen AR, Hetland ML (2014)
   Which factors influence radiographic progression during treatment with tumor necrosis factor inhibitors in clinical practice? Results from 930 patients with rheumatoid arthritis in the nationwide Danish DANBIO registry
   J Rheumatol, 41 (12), 2352-60
   DOI 10.3899/jrheum.131299, PubMed 25274894

Publications 2013

1. Conaghan PG, McQueen FM, Bird P, Peterfy C, Haavardsholm E, Gandjbakhch F, Eshed I, Haugen IK, Lillegraven S, Døhn UM, Ejbjerg B, Foltz V, Coates L, Bøyesen P, Hermann KG, Freeston J, Lassere M, O'Connor P, Emery P, Genant H, Østergaard M (2013)
   Update on the OMERACT magnetic resonance imaging task force: research and future directions
   J Rheumatol, 41 (2), 383-5
   DOI 10.3899/jrheum.131085, PubMed 24293579
2. Døhn UM, Conaghan PG, Eshed I, Boonen A, Boyesen P, Peterfy CG, Lillegraven S, Ejbjerg B, Gandjbakhch F, Bird P, Foltz V, Genant HK, Haavardsholm E, McQueen FM, Østergaard M (2013)
   The OMERACT-RAMRIS rheumatoid arthritis magnetic resonance imaging joint space narrowing score: intrareader and interreader reliability and agreement with computed tomography and conventional radiography
   J Rheumatol, 41 (2), 392-7
   DOI 10.3899/jrheum.131087, PubMed 24293568
3. Gandjbakhch F, Haavardsholm EA, Conaghan PG, Ejbjerg B, Foltz V, Brown AK, Døhn UM, Lassere M, Freeston JE, Olsen IC, Bøyesen P, Bird P, Fautrel B, Hetland ML, Emery P, Bourgeois P, Hørslev-Petersen K, Kvien TK, McQueen FM, Østergaard M (2013)
   Determining a magnetic resonance imaging inflammatory activity acceptable state without subsequent radiographic progression in rheumatoid arthritis: results from a followup MRI study of 254 patients in clinical remission or low disease activity
   J Rheumatol, 41 (2), 398-406
   DOI 10.3899/jrheum.131088, PubMed 24334647
4. Haugen IK, Østergaard M, Eshed I, McQueen FM, Bird P, Gandjbakhch F, Foltz V, Genant H, Peterfy C, Lillegraven S, Haavardsholm EA, Bøyesen P, Conaghan PG (2013)
   Iterative development and reliability of the OMERACT hand osteoarthritis MRI scoring system
   J Rheumatol, 41 (2), 386-91
   DOI 10.3899/jrheum.131086, PubMed 24293570
5. Schwartz T, Sanner H, Gjesdal O, Flatø B, Sjaastad I (2013)
   In juvenile dermatomyositis, cardiac systolic dysfunction is present after long-term follow-up and is predicted by sustained early skin activity
   Ann Rheum Dis, 73 (10), 1805-10
   DOI 10.1136/annrheumdis-2013-203279, PubMed 23881732

Publications 2012

1. Eike MC, Skinningsrud B, Ronninger M, Stormyr A, Kvien TK, Joner G, Njølstad PR, Førre O, Flatø B, Alfredsson L, Padyukov L, Undlien DE, Lie BA (2012)
   CIITA gene variants are associated with rheumatoid arthritis in Scandinavian populations
   Genes Immun, 13 (5), 431-6
   DOI 10.1038/gene.2012.11, PubMed 22513452
2. Lilleby V, Palm Ø, Andersson H, Gran JT, Aaløkken TM (2012)
   [A man in his sixties with hoarseness, difficulty breathing and chest pain]
   Tidsskr Nor Laegeforen, 132 (3), 308-11
   DOI 10.4045/tidsskr.11.0765, PubMed 22314743
3. Ruperto N, Brunner HI, Quartier P, Constantin T, Wulffraat N, Horneff G, Brik R, McCann L, Kasapcopur O, Rutkowska-Sak L, Schneider R, Berkun Y, Calvo I, Erguven M, Goffin L, Hofer M, Kallinich T, Oliveira SK, Uziel Y, Viola S, Nistala K, Wouters C, Cimaz R, Ferrandiz MA, Flato B et al. (2012)
   Two randomized trials of canakinumab in systemic juvenile idiopathic arthritis
   N Engl J Med, 367 (25), 2396-406
   DOI 10.1056/NEJMoa1205099, PubMed 23252526
4. Tollisen A, Sanner H, Flatø B, Wahl AK (2012)
   Quality of life in adults with juvenile-onset dermatomyositis: a case-control study
   Arthritis Care Res (Hoboken), 64 (7), 1020-7
   DOI 10.1002/acr.21637, PubMed 22328537

Publications 2011

1. Nordang GB, Viken MK, Amundsen SS, Sanchez ES, Flatø B, Førre OT, Martin J, Kvien TK, Lie BA (2011)
   Interferon regulatory factor 5 gene polymorphism confers risk to several rheumatic diseases and correlates with expression of alternative thymic transcripts
   Rheumatology (Oxford), 51 (4), 619-26
   DOI 10.1093/rheumatology/ker364, PubMed 22179739
2. Schwartz T, Sanner H, Husebye T, Flatø B, Sjaastad I (2011)
   Cardiac dysfunction in juvenile dermatomyositis: a case-control study
   Ann Rheum Dis, 70 (5), 766-71
   DOI 10.1136/ard.2010.137968, PubMed 21216816
3. Staalesen Strumse YA, Nordvåg BY, Stanghelle JK, Røisland M, Winther A, Pajunen PA, Garen T, Flatø B (2011)
   Efficacy of rehabilitation for patients with ankylosing spondylitis: comparison of a four-week rehabilitation programme in a Mediterranean and a Norwegian setting
   J Rehabil Med, 43 (6), 534-42
   DOI 10.2340/16501977-0804, PubMed 21491073

Publications 2010

1. Arvidsson LZ, Fjeld MG, Smith HJ, Flatø B, Ogaard B, Larheim TA (2010)
   Craniofacial growth disturbance is related to temporomandibular joint abnormality in patients with juvenile idiopathic arthritis, but normal facial profile was also found at the 27-year follow-up
   Scand J Rheumatol, 39 (5), 373-9
   DOI 10.3109/03009741003685624, PubMed 20615158
2. Arvidsson LZ, Smith HJ, Flatø B, Larheim TA (2010)
   Temporomandibular joint findings in adults with long-standing juvenile idiopathic arthritis: CT and MR imaging assessment
   Radiology, 256 (1), 191-200
   DOI 10.1148/radiol.10091810, PubMed 20574096
3. Fjeld M, Arvidsson L, Smith HJ, Flatø B, Ogaard B, Larheim T (2010)
   Relationship between disease course in the temporomandibular joints and mandibular growth rotation in patients with juvenile idiopathic arthritis followed from childhood to adulthood
   Pediatr Rheumatol Online J, 8, 13
   DOI 10.1186/1546-0096-8-13, PubMed 20412568
4. Lien G, Ueland T, Godang K, Selvaag AM, Førre OT, Flatø B (2010)
   Serum levels of osteoprotegerin and receptor activator of nuclear factor -κB ligand in children with early juvenile idiopathic arthritis: a 2-year prospective controlled study
   Pediatr Rheumatol Online J, 8, 30
   DOI 10.1186/1546-0096-8-30, PubMed 21134287
5. Ostile IL, Johansson I, Aasland A, Flatö B, Möller A (2010)
   Self-rated physical and psychosocial health in a cohort of young adults with juvenile idiopathic arthritis
   Scand J Rheumatol, 39 (4), 318-25
   DOI 10.3109/03009740903505213, PubMed 20476866
6. Ruperto N, Pistorio A, Ravelli A, Rider LG, Pilkington C, Oliveira S, Wulffraat N, Espada G, Garay S, Cuttica R, Hofer M, Quartier P, Melo-Gomes J, Reed AM, Wierzbowska M, Feldman BM, Harjacek M, Huppertz HI, Nielsen S, Flato B, Lahdenne P, Michels H, Murray KJ, Punaro L, Rennebohm R et al. (2010)
   The Paediatric Rheumatology International Trials Organisation provisional criteria for the evaluation of response to therapy in juvenile dermatomyositis
   Arthritis Care Res (Hoboken), 62 (11), 1533-41
   DOI 10.1002/acr.20280, PubMed 20583105
7. Sanner H, Kirkhus E, Merckoll E, Tollisen A, Røisland M, Lie BA, Taraldsrud E, Gran JT, Flatø B (2010)
   Long-term muscular outcome and predisposing and prognostic factors in juvenile dermatomyositis: A case-control study
   Arthritis Care Res (Hoboken), 62 (8), 1103-11
   DOI 10.1002/acr.20203, PubMed 20506141
8. Sanner H, Aaløkken TM, Gran JT, Sjaastad I, Johansen B, Flatø B (2010)
   Pulmonary outcome in juvenile dermatomyositis: a case-control study
   Ann Rheum Dis, 70 (1), 86-91
   DOI 10.1136/ard.2010.131433, PubMed 20805295

Publications 2009

1. Arvidsson LZ, Flatø B, Larheim TA (2009)
   Radiographic TMJ abnormalities in patients with juvenile idiopathic arthritis followed for 27 years
   Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 108 (1), 114-23
   DOI 10.1016/j.tripleo.2009.03.012, PubMed 19540449
2. Conaghan PG, Bird P, McQueen F, Peterfy C, Bøyesen P, Gandjbakhch F, Duer-Jensen A, Haavardsholm EA, Ejbjerg B, Wiell C, Coates L, Hermann KG, O'Connor P, Lassere M, Freeston JE, Anandarajah A, Genant H, Emery P, Ostergaard M (2009)
   The OMERACT MRI inflammatory arthritis group: advances and future research priorities
   J Rheumatol, 36 (8), 1803-5
   DOI 10.3899/jrheum.090349, PubMed 19671816
3. Flatø B, Lien G, Smerdel-Ramoya A, Vinje O (2009)
   Juvenile psoriatic arthritis: longterm outcome and differentiation from other subtypes of juvenile idiopathic arthritis
   J Rheumatol, 36 (3), 642-50
   DOI 10.3899/jrheum.080543, PubMed 19208605
4. McQueen F, Lassere M, Duer-Jensen A, Wiell C, Conaghan PG, Gandjbakhch F, Hermann KG, Bird P, Bøyesen P, Peterfy C, Ejbjerg B, Haavardsholm EA, Coates L, Ostergaard M (2009)
   Testing an OMERACT MRI scoring system for peripheral psoriatic arthritis in cross-sectional and longitudinal settings
   J Rheumatol, 36 (8), 1811-5
   DOI 10.3899/jrheum.090351, PubMed 19671818
5. Ostergaard M, McQueen F, Wiell C, Bird P, Bøyesen P, Ejbjerg B, Peterfy C, Gandjbakhch F, Duer-Jensen A, Coates L, Haavardsholm EA, Hermann KG, Lassere M, O'Connor P, Emery P, Genant H, Conaghan PG (2009)
   The OMERACT psoriatic arthritis magnetic resonance imaging scoring system (PsAMRIS): definitions of key pathologies, suggested MRI sequences, and preliminary scoring system for PsA Hands
   J Rheumatol, 36 (8), 1816-24
   DOI 10.3899/jrheum.090352, PubMed 19671819
6. Ostlie IL, Aasland A, Johansson I, Flatö B, Möller A (2009)
   A longitudinal follow-up study of physical and psychosocial health in young adults with chronic childhood arthritis
   Clin Exp Rheumatol, 27 (6), 1039-46
   PubMed 20149328
7. Sanner H, Gran JT, Sjaastad I, Flatø B (2009)
   Cumulative organ damage and prognostic factors in juvenile dermatomyositis: a cross-sectional study median 16.8 years after symptom onset
   Rheumatology (Oxford), 48 (12), 1541-7
   DOI 10.1093/rheumatology/kep302, PubMed 19776224
8. Skinningsrud B, Lie BA, Husebye ES, Kvien TK, Førre Ø, Flatø B, Stormyr A, Joner G, Njølstad PR, Egeland T, Undlien DE (2009)
   A CLEC16A variant confers risk for juvenile idiopathic arthritis and anti-cyclic citrullinated peptide antibody negative rheumatoid arthritis
   Ann Rheum Dis, 69 (8), 1471-4
   DOI 10.1136/ard.2009.114934, PubMed 19734133
9. Staalesen Strumse YA, Nordvag BY, Stanghelle JK, Røsland M, Winther A, Pajunen PA, Garen T, Flatø B (2009)
   The efficacy of rehabilitation for patients with rheumatoid arthritis: comparison between a 4-week rehabilitation programme in a warm and cold climate
   Scand J Rheumatol, 38 (1), 28-37
   DOI 10.1080/03009740802304549, PubMed 18728936
10. Aaløkken TM, Lilleby V, Søyseth V, Mynarek G, Pripp AH, Johansen B, Førre O, Kolbenstvedt A (2009)
    Chest abnormalities in juvenile-onset mixed connective tissue disease: assessment with high-resolution computed tomography and pulmonary function tests
    Acta Radiol, 50 (4), 430-6
    DOI 10.1080/02841850902787677, PubMed 19277918

Publications 2008

1. Dolman KM, Brouwer N, Frakking FN, Flatø B, Tak PP, Kuijpers TW, Førre O, Smerdel-Ramoya A (2008)
   Mannose-binding lectin deficiency is associated with early onset of polyarticular juvenile rheumatoid arthritis: a cohort study
   Arthritis Res Ther, 10 (2), R32
   DOI 10.1186/ar2386, PubMed 18334024
2. Riise ØR, Handeland KS, Cvancarova M, Wathne KO, Nakstad B, Abrahamsen TG, Kirkhus E, Flatø B (2008)
   Incidence and characteristics of arthritis in Norwegian children: a population-based study
   Pediatrics, 121 (2), e299-306
   DOI 10.1542/peds.2007-0291, PubMed 18227193
3. Riise ØR, Kirkhus E, Handeland KS, Flatø B, Reiseter T, Cvancarova M, Nakstad B, Wathne KO (2008)
   Childhood osteomyelitis-incidence and differentiation from other acute onset musculoskeletal features in a population-based study
   BMC Pediatr, 8, 45
   DOI 10.1186/1471-2431-8-45, PubMed 18937840
4. Riise ØR, Lee A, Cvancarova M, Handeland KS, Wathne KO, Nakstad B, Gaustad P, Flatø B (2008)
   Recent-onset childhood arthritis--association with Streptococcus pyogenes in a population-based study
   Rheumatology (Oxford), 47 (7), 1006-11
   DOI 10.1093/rheumatology/ken122, PubMed 18420659

Publications 2007

1. Eike MC, Nordang GB, Karlsen TH, Boberg KM, Vatn MH, IBSEN study group, Dahl-Jørgensen K, Rønningen KS, Joner G, Flatø B, Bergquist A, Thorsby E, Førre O, Kvien TK, Undlien DE, Lie BA (2007)
   The FCRL3 -169T>C polymorphism is associated with rheumatoid arthritis and shows suggestive evidence of involvement with juvenile idiopathic arthritis in a Scandinavian panel of autoimmune diseases
   Ann Rheum Dis, 67 (9), 1287-91
   DOI 10.1136/ard.2007.077826, PubMed 18065500
2. Lilleby V (2007)
   Bone status in juvenile systemic lupus erythematosus
   Lupus, 16 (8), 580-6
   DOI 10.1177/0961203307079040, PubMed 17711892
3. Lilleby V, Haugen M, Mørkrid L, Frey Frøslie K, Holven KB, Førre O (2007)
   Body composition, lipid and lipoprotein levels in childhood-onset systemic lupus erythematosus
   Scand J Rheumatol, 36 (1), 40-7
   DOI 10.1080/03009740600907881, PubMed 17454934
4. Lindner E, Nordang GB, Melum E, Flatø B, Selvaag AM, Thorsby E, Kvien TK, Førre OT, Lie BA (2007)
   Lack of association between the chemokine receptor 5 polymorphism CCR5delta32 in rheumatoid arthritis and juvenile idiopathic arthritis
   BMC Med Genet, 8, 33
   DOI 10.1186/1471-2350-8-33, PubMed 17565662
5. Viken MK, Sollid HD, Joner G, Dahl-Jørgensen K, Rønningen KS, Undlien DE, Flatø B, Selvaag AM, Førre Ø, Kvien TK, Thorsby E, Melms A, Tolosa E, Lie BA (2007)
   Polymorphisms in the cathepsin L2 (CTSL2) gene show association with type 1 diabetes and early-onset myasthenia gravis
   Hum Immunol, 68 (9), 748-55
   DOI 10.1016/j.humimm.2007.05.009, PubMed 17869649

Publications 2006

1. Flatø B, Hoffmann-Vold AM, Reiff A, Førre Ø, Lien G, Vinje O (2006)
   Long-term outcome and prognostic factors in enthesitis-related arthritis: a case-control study
   Arthritis Rheum, 54 (11), 3573-82
   DOI 10.1002/art.22181, PubMed 17075863
2. Gutiérrez-Suárez R, Pistorio A, Cespedes Cruz A, Norambuena X, Flato B, Rumba I, Harjacek M, Nielsen S, Susic G, Mihaylova D, Huemer C, Melo-Gomes J, Andersson-Gare B, Balogh Z, De Cunto C, Vesely R, Pagava K, Romicka AM, Burgos-Vargas R, Martini A, Ruperto N, Pediatric Rheumatology International Trials Organisation (PRINTO) (2006)
   Health-related quality of life of patients with juvenile idiopathic arthritis coming from 3 different geographic areas. The PRINTO multinational quality of life cohort study
   Rheumatology (Oxford), 46 (2), 314-20
   DOI 10.1093/rheumatology/kel218, PubMed 16877459
3. Lilleby V, Aaløkken TM, Johansen B, Førre Ø (2006)
   Pulmonary involvement in patients with childhood-onset systemic lupus erythematosus
   Clin Exp Rheumatol, 24 (2), 203-8
   PubMed 16762160
4. Reikvam A, Hexeberg S, Kvien TK, Slørdal L, Aabakken L, Engebretsen L, Flatø B, Idsø N, Johnsen V, Kalstad S, Madsen S, Mikkelsen K, Os I, REder J (2006)
   [Clinical use of COX inhibitors--a consensus]
   Tidsskr Nor Laegeforen, 126 (5), 591-5
   PubMed 16505867
5. Selvaag AM, Flatø B, Dale K, Lien G, Vinje O, Smerdel-Ramoya A, Førre Ø (2006)
   Radiographic and clinical outcome in early juvenile rheumatoid arthritis and juvenile spondyloarthropathy: a 3-year prospective study
   J Rheumatol, 33 (7), 1382-91
   PubMed 16758503

Publications 2005

1. Clarke-Jenssen AC, Fredriksen PM, Lilleby V, Mengshoel AM (2005)
   Effects of supervised aerobic exercise in patients with systemic lupus erythematosus: a pilot study
   Arthritis Rheum, 53 (2), 308-12
   DOI 10.1002/art.21082, PubMed 15818657
2. Lien G, Selvaag AM, Flatø B, Haugen M, Vinje O, Sørskaar D, Dale K, Egeland T, Førre Ø (2005)
   A two-year prospective controlled study of bone mass and bone turnover in children with early juvenile idiopathic arthritis
   Arthritis Rheum, 52 (3), 833-40
   DOI 10.1002/art.20963, PubMed 15751052
3. Lilleby V, Flatø B, Førre O (2005)
   Disease duration, hypertension and medication requirements are associated with organ damage in childhood-onset systemic lupus erythematosus
   Clin Exp Rheumatol, 23 (2), 261-9
   PubMed 15895902
4. Lilleby V, Lien G, Frey Frøslie K, Haugen M, Flatø B, Førre Ø (2005)
   Frequency of osteopenia in children and young adults with childhood-onset systemic lupus erythematosus
   Arthritis Rheum, 52 (7), 2051-9
   DOI 10.1002/art.21115, PubMed 15986346
5. Ruperto N, Garcia-Munitis P, Villa L, Pesce M, Aggarwal A, Fasth A, Avcin T, Bae SC, Balogh Z, Li C, De Inocencio J, Dibra M, Dolezalova P, El Miedany Y, Flato B, Harjacek M, Huppertz HI, Kanakoudi-Tsakalidou F, Wulffraat N, Lahdenne P, Melo-Gomes JA, Mihaylova D, Nielsen S, Nikishina I, Ozdogan H et al. (2005)
   PRINTO/PRES international website for families of children with rheumatic diseases: www.pediatric-rheumatology.printo.it
   Ann Rheum Dis, 64 (7), 1101-6
   DOI 10.1136/ard.2004.030221, PubMed 15760930
6. Selvaag AM, Lien G, Sørskaar D, Vinje O, Førre Ø, Flatø B (2005)
   Early disease course and predictors of disability in juvenile rheumatoid arthritis and juvenile spondyloarthropathy: a 3 year prospective study
   J Rheumatol, 32 (6), 1122-30
   PubMed 15940778
7. Smerdel-Ramoya A, Finholt C, Lilleby V, Gilboe IM, Harbo HF, Maslinski S, Førre Ø, Thorsby E, Lie BA (2005)
   Systemic lupus erythematosus and the extended major histocompatibility complex--evidence for several predisposing loci
   Rheumatology (Oxford), 44 (11), 1368-73
   DOI 10.1093/rheumatology/kei015, PubMed 16174649
8. Viken MK, Amundsen SS, Kvien TK, Boberg KM, Gilboe IM, Lilleby V, Sollid LM, Førre OT, Thorsby E, Smerdel A, Lie BA (2005)
   Association analysis of the 1858C>T polymorphism in the PTPN22 gene in juvenile idiopathic arthritis and other autoimmune diseases
   Genes Immun, 6 (3), 271-3
   DOI 10.1038/sj.gene.6364178, PubMed 15759012

Publications 2004

1. Smerdel A, Dai KZ, Lorentzen AR, Flatø B, Maslinski S, Thorsby E, Førre Ø, Spurkland A (2004)
   Genetic association between juvenile rheumatoid arthritis and polymorphism in the SH2D2A gene
   Genes Immun, 5 (4), 310-2
   DOI 10.1038/sj.gene.6364093, PubMed 15129233

Publications 2003

1. Flatø B, Lien G, Smerdel A, Vinje O, Dale K, Johnston V, Sørskaar D, Moum T, Ploski R, Førre Ø (2003)
   Prognostic factors in juvenile rheumatoid arthritis: a case-control study revealing early predictors and outcome after 14.9 years
   J Rheumatol, 30 (2), 386-93
   PubMed 12563700
2. Lien G, Flatø B, Haugen M, Vinje O, Sørskaar D, Dale K, Johnston V, Egeland T, Førre Ø (2003)
   Frequency of osteopenia in adolescents with early-onset juvenile idiopathic arthritis: a long-term outcome study of one hundred five patients
   Arthritis Rheum, 48 (8), 2214-23
   DOI 10.1002/art.11097, PubMed 12905475
3. Selvaag AM, Flatø B, Lien G, Sørskaar D, Vinje O, Førre Ø (2003)
   Measuring health status in early juvenile idiopathic arthritis: determinants and responsiveness of the child health questionnaire
   J Rheumatol, 30 (7), 1602-10
   PubMed 12858465

Publications 2002

1. Flatø B, Smerdel A, Johnston V, Lien G, Dale K, Vinje O, Egeland T, Sørskaar D, Førre Ø (2002)
   The influence of patient characteristics, disease variables, and HLA alleles on the development of radiographically evident sacroiliitis in juvenile idiopathic arthritis
   Arthritis Rheum, 46 (4), 986-94
   DOI 10.1002/art.10146, PubMed 11953976
2. Haugen MA, Lien G, Flatø B, Kvammen JA, Vinje O, Sørskaar D, Førre Ø (2002)
   Minor impact of juvenile arthritis on nutritional status in young adult patients
   Arthritis Rheum, 47 (6), 623-9
   DOI 10.1002/art.10799, PubMed 12522836
3. Smerdel A, Ploski R, Flatø B, Musiej-Nowakowska E, Thorsby E, Førre Ø (2002)
   Juvenile idiopathic arthritis (JIA) is primarily associated with HLA-DR8 but not DQ4 on the DR8-DQ4 haplotype
   Ann Rheum Dis, 61 (4), 354-7
   DOI 10.1136/ard.61.4.354, PubMed 11874841

Publications 2001

1. Selvaag AM, Ruperto N, Asplin L, Rygg M, Landgraf JM, Forre Ø, Flatø B, Paediatric Rheumatology International Trials Organisation (2001)
   The Norwegian version of the Childhood Health Assessment Questionnaire (CHAQ) and the Child Health Questionnaire (CHQ)
   Clin Exp Rheumatol, 19 (4 Suppl 23), S116-20
   PubMed 11510313

Publications 2000

1. Haugen M, Lien G, Flatø B, Kvammen J, Vinje O, Sørskaar D, Førre O (2000)
   Young adults with juvenile arthritis in remission attain normal peak bone mass at the lumbar spine and forearm
   Arthritis Rheum, 43 (7), 1504-10
   DOI 10.1002/1529-0131(200007)43:7<1504::AID-ANR13>3.0.CO;2-0, PubMed 10902752
2. Lilleby V, Gran JT (2000)
   [Felty's syndrome]
   Tidsskr Nor Laegeforen, 120 (9), 1038-40
   PubMed 10833963
3. Vinje O, Flatø B, Førre O (2000)
   [Classification of idiopathic juvenile arthritis]
   Tidsskr Nor Laegeforen, 120 (4), 459-65
   PubMed 10833937

Publications 1998

1. Flatø B, Sørskaar D, Vinje O, Lien G, Aasland A, Moum T, Førre O (1998)
   Measuring disability in early juvenile rheumatoid arthritis: evaluation of a Norwegian version of the childhood Health Assessment Questionnaire
   J Rheumatol, 25 (9), 1851-8
   PubMed 9733471
2. Flatø B, Vinje O, Førre O (1998)
   Toxicity of antirheumatic and anti-inflammatory drugs in children
   Clin Rheumatol, 17 (6), 505-10
   DOI 10.1007/BF01451288, PubMed 9890680
3. Flatø B, Aasland A, Vinje O, Førre O (1998)
   Outcome and predictive factors in juvenile rheumatoid arthritis and juvenile spondyloarthropathy
   J Rheumatol, 25 (2), 366-75
   PubMed 9489836
4. Aasland A, Flatø B, Vandvik IH (1998)
   Patient and parent experiences with health care services in pediatric rheumatology
   Scand J Rheumatol, 27 (4), 265-72
   DOI 10.1080/030097498442370, PubMed 9751466

Publications 1997

1. Flatø B, Aasland A, Vandvik IH, Førre O (1997)
   Outcome and predictive factors in children with chronic idiopathic musculoskeletal pain
   Clin Exp Rheumatol, 15 (5), 569-77
   PubMed 9307867
2. Lilleby V, Gran JT (1997)
   [Systemic rheumatoid arthritis]
   Tidsskr Nor Laegeforen, 117 (29), 4223-5
   PubMed 9441465
3. Aasland A, Flatö B, Vandvik IH (1997)
   Psychosocial factors in children with idiopathic musculoskeletal pain: a prospective, longitudinal study
   Acta Paediatr, 86 (7), 740-6
   DOI 10.1111/j.1651-2227.1997.tb08578.x, PubMed 9240883
4. Aasland A, Flatø B, Vandvik IH (1997)
   Psychosocial outcome in juvenile chronic arthritis: a nine-year follow-up
   Clin Exp Rheumatol, 15 (5), 561-8
   PubMed 9307866

Publications 1995

1. Albertioni F, Flatø B, Seideman P, Beck O, Vinje O, Peterson C, Eksborg S (1995)
   Methotrexate in juvenile rheumatoid arthritis. Evidence of age dependent pharmacokinetics
   Eur J Clin Pharmacol, 47 (6), 507-11
   DOI 10.1007/BF00193703, PubMed 7768253
2. Ploski R, Flatø B, Vinje O, Maksymowych W, Førre O, Thorsby E (1995)
   Association to HLA-DRB1*08, HLA-DPB1*0301 and homozygosity for an HLA-linked proteasome gene in juvenile ankylosing spondylitis
   Hum Immunol, 44 (2), 88-96
   DOI 10.1016/0198-8859(95)00063-a, PubMed 8847233
3. Ploski R, McDowell TL, Symons JA, Flatø B, Duff GW, Thorsby E, Førre O (1995)
   Interaction between HLA-DR and HLA-DP, and between HLA and interleukin 1 alpha in juvenile rheumatoid arthritis indicates heterogeneity of pathogenic mechanisms of the disease
   Hum Immunol, 42 (4), 343-7
   DOI 10.1016/0198-8859(94)00098-b, PubMed 7558921