1. Department of Orthopedic Surgery, Akershus University Hospital, Lørenskog, Norway.
2. Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
3. Oslo Sports Trauma Research Center, Norwegian School of Sport Sciences, Oslo, Norway.
4. Department of Orthopaedic Surgery, Oslo University Hospital, Oslo, Norway.
5. Norwegian Cruciate Ligament Register, Bergen, Norway.
6. Capio Artro Clinic, Stockholm, Sweden.
7. Stockholm Sports Trauma Research Center, Karolinska Institutet, Stockholm, Sweden.
8. Norwegian Arthroplasty Register, Department of Orthopedic Surgery, Haukeland University Hospital, Bergen, Norway.
9. Department of Occupational Medicine, Haukeland University Hospital, Bergen, Norway.