Project 1: In cooperation with Kyoto University Hospital in Japan, Malmö University Hospital in Sweden and Haukeland University Hospital in Norway on the field of "Indication and treatment of adult kyphpscoliosis".

Workpackage 1: Patients operated with spinal fixation for the correction of spinal deformity at Oslo University Hospital Ullevål in Oslo, Norway, Haukeland University Hospital in Bergen, Norway, Malmø University hospital in Sweden and Kyoto University Hospital in Japan, during the past five years. A >1-year retrospective follow-up of the osteotomy patients by questionnaires and radiography.

Workpackage 2: Patients to be operated for the correction of spinal deformity during the following two-tree years at Oslo University Hospital Ullevål in Norway, Haukeland University Hospital in Bergen Norway, Malmø University hospital in Sweden and Kyoto University Hospital in Japan.

Workpackage 3: To evaluate the influence of different surgical treatment options for kyphoscoliosis we measure the movement of the SI joint with Radiostereometric analysis (RSA) after short and long lumbar fixations.

Project 2: “Changes in lumbar lordosis after lumbar microsurgery of the spine”. A part of the running NORSTEN study.