1. Musculoskeletal Sciences, Department of Orthopedics, Clinical Sciences Lund; Lund University; Lund Sweden
2. Research and Development Center at Spenshult Hospital; Oskarström Sweden
3. Department of Rheumatology, Clinical Sciences Lund and Malmö; Lund University; Lund Sweden
4. School of Health Sciences; Jönköping University; Jönköping Sweden