1. Institute of Clinical Medicine Faculty of Medicine University of Oslo Postboks 1078 Blindern 0316 Oslo Norway
2. Department of Physical Medicine and Rehabilitation Oslo University Hospital Postboks 4956 0242 Oslo Nydalen Norway
3. Research and Communication Unit for Musculoskeletal Health (FORMI) Division of Clinical Neuroscience Oslo University Hospital Postboks 4956 0242 Oslo Nydalen Norway
4. Department of Rehabilitation Sciences and Health Technology Faculty of Health Sciences Oslo Metropolitan University Postboks 4, St. Olavs plass 0130 Oslo Norway
5. Norwegian Olympic and Paralympics committee and confederation of sports Postboks 5000 0840 Oslo Norway
6. VID Specialized University Diakonveien 12‐18 0370 Oslo Norway