1Martin Orthopaedic Biomechanics Laboratory, Shuter Wing (Room 5-066), St. Michael’s Hospital, 30 Bond Street, Toronto, ON, M5B 1W8, Canada;
2Department of Mechanical and Industrial Engineering, Ryerson University, Toronto, ON, M5B 2K3, Canada
3Medtronic International Trading Sàrl, Tolochenaz CH-1131, Switzerland
4Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, ON, M5S 1A8, Canada
5Division of Orthopaedic Surgery, Toronto Western Hospital, Toronto, ON, M5T 2S8, Canada