1. Division of Physiotherapy, Department of Neurobiology, Health Care Sciences and Society, Karolinska Institutet, 14183 Huddinge, Sweden
2. Division of Physiotherapy, Department of Orthopaedics, Danderyd Hospital, 18288 Stockholm, Sweden
3. Centre for Research and Development, Uppsala University, Region Gävleborg, 80188 Gävle, Sweden
4. Unit of Rheumatology, Department of Public Health and Clinical Medicine, Umeå University, 90187 Umeå, Sweden
5. Pain and Rehabilitation Center, Department of Health, Medicine and Caring Sciences, Linköping University, 58183 Linköping, Sweden