Publications 2019

Haug HM, Johnson E, Mala T, Forland DT, Sovik TT, Johannessen HO (2019)
Incarcerated paraesophageal hernia complicated by pancreatic damage and unusual comorbidity: Two retrospective case series
Int. J. Surg. Case Rep., 54, 75-78
DOI 10.1016/j.ijscr.2018.11.064

Salte OB, Sovik TT, Risstad H, Skattum J, Blom-Hogestol IK, Eribe IEL, Kristinsson JA, Mala T (2019)
Bariatric surgery at Oslo University Hospital 2004-14
Tidsskr. Nor. Laegeforen., 139 (10), 921-926

Publications 2018

Hewitt S, Aasheim ET, Sovik TT, Jahnsen J, Kristinsson J, Eriksen EF, Mala T (2018)
Relationships of serum 25-hydroxyvitamin D, ionized calcium and parathyroid hormone after obesity surgery
Clin. Endocrinol., 88 (3), 372-379
DOI 10.1111/cen.13531

Svanevik M, Risstad H, Karlsen TI, Kristinsson JA, Smastuen MC, Kolotkin RL, Sovik TT, Sandbu R, Mala T, Hjelmesaeth J (2018)
Patient-Reported Outcome Measures 2 Years After Standard and Distal Gastric Bypass-a Double-Blind Randomized Controlled Trial
Obes. Surg., 28 (3), 606-614
DOI 10.1007/s11695-017-2891-3

Publications 2016

Risstad H, Svanevik M, Kristinsson IA, Hjelmesaeth J, Aasheim ET, Hofso D, Sovik TT, Karlsen TI, Fagerland MW, Sandbu R, Mala T (2016)
Standard vs Distal Roux-en-Y Gastric Bypass in Patients With Body Mass Index 50 to 60 A Double-blind, Randomized Clinical Trial
JAMA Surg., 151 (12), 1146-1155
DOI 10.1001/jamasurg.2016.2798

Publications 2015

Engstrom M, Forsberg A, Sovik TT, Olbers T, Lonroth H, Karlsson J (2015)
Perception of Control Over Eating After Bariatric Surgery for Super-Obesity-a 2-Year Follow-Up Study
Obes. Surg., 25 (6), 1086-1093
DOI 10.1007/s11695-015-1652-4

Mala T, Sovik TT, Kristinsson JA (2015)
Maximum possible benefit from bariatric surgery
Tidsskr. Nor. Laegeforen., 135 (6), 521-522
DOI 10.4045/tidsskr.15.0187

Risstad H, Sovik TT, Engstrom M, Aasheim ET, Fagerland MW, Olsen MF, Kristinsson JA, le Roux CW, Bohmer T, Birkeland KI, Mala T, Olbers T (2015)
Five-Year Outcomes After Laparoscopic Gastric Bypass and Laparoscopic Duodenal Switch in Patients With Body Mass Index of 50 to 60 A Randomized Clinical Trial
JAMA Surg., 150 (4), 352-361
DOI 10.1001/jamasurg.2014.3579

Risstad H, Sovik TT, Hewitt S, Kristinsson JA, Fagerland MW, Bernklev T, Mala T (2015)
Changes in Health-Related Quality of Life After Gastric Bypass in Patients With and Without Obesity-Related Disease
Obes. Surg., 25 (12), 2408-2416
DOI 10.1007/s11695-015-1717-4

Svanevik M, Risstad H, Hofso D, Schou CF, Solheim B, Sovik TT, Kristinsson J, Hjelmesaeth J, Mala T, Sandbu R (2015)
Perioperative Outcomes of Proximal and Distal Gastric Bypass in Patients with BMI Ranged 50-60 kg/m(2)-A Double-Blind, Randomized Controlled Trial
Obes. Surg., 25 (10), 1788-1795
DOI 10.1007/s11695-015-1621-y

Publications 2014

Aftab H, Risstad H, Sovik TT, Bernklev T, Hewitt S, Kristinsson JA, Mala T (2014)
Five-year outcome after gastric bypass for morbid obesity in a Norwegian cohort
Surg. Obes. Relat. Dis., 10 (1), 71-78
DOI 10.1016/j.soard.2013.05.003

Biorserud C, Olbers T, Sovik TT, Mala T, Elander A, Olseen MF (2014)
Experience of excess skin after gastric bypass or duodenal switch in patients with super obesity
Surg. Obes. Relat. Dis., 10 (5), 891-896
DOI 10.1016/j.soard.2014.01.033

Hewitt S, Humerfelt S, Sovik TT, Aasheim ET, Risstad H, Kristinsson J, Mala T (2014)
Long-Term Improvements in Pulmonary Function 5 Years After Bariatric Surgery
Obes. Surg., 24 (5), 705-711
DOI 10.1007/s11695-013-1159-9

Miras AD, Risstad H, Baqai N, Law S, Sovik TT, Mala T, Olbers T, Kristinsson JA, le Roux CW (2014)
Application of the International Diabetes Federation and American Diabetes Association criteria in the assessment of metabolic control after bariatric surgery
Diabetes Obes. Metab., 16 (1), 86-89
DOI 10.1111/dom.12177

Publications 2013

Hewitt S, Sovik TT, Aasheim ET, Kristinsson J, Jahnsen J, Birketvedt GS, Bohmer T, Eriksen EF, Mala T (2013)
Secondary Hyperparathyroidism, Vitamin D Sufficiency, and Serum Calcium 5 Years After Gastric Bypass and Duodenal Switch
Obes. Surg., 23 (3), 384-390
DOI 10.1007/s11695-012-0772-3

Hofmann B, Hjelmesaeth J, Sovik TT (2013)
Moral challenges with surgical treatment of type 2 diabetes
J. Diabetes Complications, 27 (6), 597-603
DOI 10.1016/j.jdiacomp.2013.07.006

Mala T, Sovik TT, Schou CF, Kristinsson J (2013)
Blood clot obstruction of the jejunojejunostomy after laparoscopic gastric bypass
Surg. Obes. Relat. Dis., 9 (2), 234-237
DOI 10.1016/j.soard.2011.12.014

Sovik TT, Karlsson J, Aasheim ET, Fagerland MW, Bjorkman S, Engstrom M, Kristinsson J, Olbers T, Mala T (2013)
Gastrointestinal function and eating behavior after gastric bypass and duodenal switch
Surg. Obes. Relat. Dis., 9 (5), 641-647
DOI 10.1016/j.soard.2012.06.006

Publications 2012

Pournaras DJ, Aasheim ET, Sovik TT, Andrews R, Mahon D, Welbourn R, Olbers T, le Roux CW (2012)
Effect of the definition of type II diabetes remission in the evaluation of bariatric surgery for metabolic disorders
Br. J. Surg., 99 (1), 100-103
DOI 10.1002/bjs.7704

Publications 2011

Sovik TT, Aasheim ET, Taha O, Engstrom M, Fagerland MW, Bjorkman S, Kristinsson J, Birkeland KI, Mala T, Olbers T (2011)
Weight Loss, Cardiovascular Risk Factors, and Quality of Life After Gastric Bypass and Duodenal Switch A Randomized Trial
Ann. Intern. Med., 155 (5), 281-U34
DOI 10.7326/0003-4819-155-5-201109060-00005

Aasheim ET, Elshorbagy AK, Diep LM, Sovik TT, Mala T, Valdivia-Garcia M, Olbers T, Bohmer T, Birkeland KI, Refsum H (2011)
Effect of bariatric surgery on sulphur amino acids and glutamate
Br. J. Nutr., 106 (3), 432-440
DOI 10.1017/S0007114511000201

Aasheim ET, Sovik TT (2011)
Global trends in body-mass index
Lancet, 377 (9781), 1916-1917
DOI 10.1016/S0140-6736(11)60804-0

Publications 2010

Sovik TT, Taha O, Aasheim ET, Engstrom M, Kristinsson J, Bjokman S, Schou CF, Lonroth H, Mala T, Olbers T (2010)
Randomized clinical trial of laparoscopic gastric bypass versus laparoscopic duodenal switch for superobesity
Br. J. Surg., 97 (2), 160-166
DOI 10.1002/bjs.6802

Sovik TT, Aasheim ET, Olbers T (2010)
Randomized clinical trial of laparoscopic gastric bypass versus laparoscopic duodenal switch for superobesity (Br J Surg 2010; 97: 160-166)
Br. J. Surg., 97 (6), 960-961
DOI 10.1002/bjs.7143

Aasheim ET, Frigstad SO, Sovik TT, Birkeland KI, Haukeland JW (2010)
Hyperinsulinemic hypoglycemia and liver cirrhosis presenting after duodenal switch: a case report
Surg. Obes. Relat. Dis., 6 (4), 441-443
DOI 10.1016/j.soard.2009.11.007

Aasheim ET, Hofso D, Sovik TT (2010)
Vitamin supplements after bariatric surgery
Clin. Endocrinol., 72 (1), 134-135
DOI 10.1111/j.1365-2265.2009.03611.x

Publications 2009

Sovik TT, Aasheim ET, Kristinsson J, Schou CF, Diep LM, Nesbakken A, Mala T (2009)
Establishing Laparoscopic Roux-en-Y Gastric Bypass: Perioperative Outcome and Characteristics of the Learning Curve
Obes. Surg., 19 (2), 158-165
DOI 10.1007/s11695-008-9584-x

Aasheim ET, Bjorkman S, Sovik TT, Engstrom M, Hanvold SE, Mala T, Olbers T, Bohmer T (2009)
Vitamin status after bariatric surgery: a randomized study of gastric bypass and duodenal switch
Am. J. Clin. Nutr., 90 (1), 15-22
DOI 10.3945/ajcn.2009.27583

Publications 2008

Aasheim ET, Sovik TT, Bakke EF (2008)
Night blindness after duodenal switch
Surg. Obes. Relat. Dis., 4 (5), 685-686
DOI 10.1016/j.soard.2008.05.001