[1] Diakonhjemmet Hospital,National Advisory Unit on Rehabilitation in Rheumatology, Department of Rheumatology
[2] Diakonhjemmet Hospital,Department of Rheumatology
[3] Oslo University Hospital,Orthopaedic Department
[4] Institute of Health and Society,Department of General Practice
[5] University of Oslo,Department of Health Sciences
[6] Institute of Health and Society,undefined
[7] University of Oslo,undefined