1. Department of Rehabilitation Science and Health Technology, Faculty of Health Sciences Oslo Metropolitan University Oslo Norway
2. Norwegian National Advisory Unit on Rehabilitation in Rheumatology Diakonhjemmet Hospital Oslo Norway
3. Norwegian National Advisory Unit on Rehabilitation in Rheumatology REMEDY, Center for treatment of Rheumatic and Musculoskeletal Diseases, Diakonhjemmet Hospital Oslo Norway
4. Martina Hansens Hospital Sandvika Norway
5. Lillehammer Rheumatism Hospital Lillehammer Norway