1. Department of Orthopaedics, Sahlgrenska University Hospital, Mölndal, Sweden
2. Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
3. Division of Orthopaedic Surgery, Department of Surgery, McMaster University, Hamilton, Ontario, Canada
4. Artroscopia GC, SL, Hospital Quirón, Barcelona, Spain
5. Fundación Garca-Cugat, Barcelona, Spain
6. Mutualidad Catalana de Futbolistas, Federación Española de Fútbol, Barcelona, Spain