1. Department of Orthopaedics, Lund University, Skåne University Hospital, Malmö, Sweden
2. Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, Odense, Denmark
3. Academy of Health and Welfare and Centre of research on Welfare, Health and Sport (CVHI), Halmstad University, Halmstad, Sweden
4. Department of Clinical Research, University of Southern Denmark, Odense, Denmark
5. Department of Orthopaedic Surgery and Traumatology, Copenhagen University Hospital – Bispebjerg and Frederiksberg, Copenhagen, Denmark
6. Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark