1. Communication and Research Unit for Musculoskeletal Disorders, Oslo University Hospital, Oslo, Norway
2. Faculty of Medicine, University of Oslo, Oslo, Norway
3. Faculty of Health Sciences, Oslo and Akershus University College of Applied Sciences, Oslo, Norway
4. Oslo Sport Trauma Research Center, Department of Sport Medicine, Norwegian School of Sport Sciences, Oslo, Norway
5. Department of Orthopaedic Surgery, Oslo University Hospital, Oslo, Norway