1 Department of Orthopedic Surgery and Traumatology, Kantonsspital Baselland, Bruderholz, Switzerland.
2 Research Group Michael T. Hirschmann, Regenerative Medicine and Biomechanics, Department of Clinical Research, University of Basel, Basel, Switzerland.
3 Department of Orthopedics and Sports Orthopedics, Klinikum Rechts der Isar, Technical University Munich, München, Germany.
4 Department of Arthroplasty, Sports Medicine and Traumatology, Orthopaedic Hospital Lindenlohe, Schwandorf, Germany.
5 Surgery Department, Hôpital Maisonneuve-Rosemont, Montreal University, Montreal, Quebec, Canada.
6 Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
7 Orthopaedics Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, Lyon, France.
8 Department of Orthopaedic Surgery, Hospital Sant Joan de Déu de Manresa, Fundació Althaia (Spain), Universitat de Vic, Manresa, Spain.