1. Research Centre for Health and Welfare Technology, Programme for Rehabilitation, VIA University College, Aarhus;
2. Research Unit for General Practice in Aarhus, Aarhus;
3. Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus;
4. Department of Clinical Medicine, Aarhus University, Aarhus;
5. Sports Orthopaedic Research Center-Copenhagen (SORC-C), Department of Orthopaedic Surgery, Copenhagen University Hospital, Hvidovre;
6. Physical Medicine and Rehabilitation Research-Copenhagen (PMR-C), Department of Physical and Occupational Therapy, Copenhagen University Hospital, Hvidovre, Denmark