1. Orthopedic Surgery, Department of Surgery, 5400 Boul Gouin O, Hôpital du Sacré-Cœur de Montréal, Montréal, QC, Canada H4J 1C5
2. Service of Orthopaedics and Traumatology, Lausanne University Hospital, Rue du Bugnon 46, CH-1011 Lausanne, Switzerland