1. Department of Clinical Sciences, Lund University, Lund, Sweden
2. Department of Orthopedics Hässleholm-Kristianstad, Hässleholm, Sweden
3. Department of Rehabilitation, Jönköping University, Jönköping, Sweden
4. Swedish National Competence Centre for Musculoskeletal Disorders (NKO), Department of Orthopedics, Lund University, Lund, Sweden
5. Local Health Care Research and Development Unit, Östergötland County Council, Linköping, Sweden