1. Steadman Philippon Research Institute, Vail, Colorado, USA
2. Department of Orthopedic Surgery, Oslo University Hospital, Oslo, Norway
3. Oslo Sports Trauma Research Center (OSTRC), Oslo, Norway
4. Instituto Brasil de Tecnologias da Saúde, Rio de Janeiro, Brazil
5. Faculty of Medicine, University of Oslo, Oslo, Norway
6. The Steadman Clinic, Vail, Colorado, USA