1. Queen Elizabeth Hospital, Division of Orthopaedic Surgery, 2100 Marlowe Ave., Montreal, Quebec, Canada, H4A 3L6
2. Division of Orthopaedic Surgery, Department of Surgery, University of Toronto; Orthopaedic Division Head, Toronto East General and Orthopaedic Hospital, 825 Coxwell Ave., Toronto, Ontario, Canada, M4C 3E7