1. Holland Orthopaedic & Arthritic Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
2. Department of Physical Therapy, Faculty of Medicine, University of Toronto, Toronto, Canada
3. Sunnybrook Health Sciences Centre, Sunnybrook Research Institute, Toronto, Canada
4. Department of Surgery, Division of Orthopedic Surgery, Sunnybrook Health Sciences Centre, Toronto, Canada
5. Department of Surgery, Division of Orthopaedic Surgery, St. Joseph's Health Centre, Toronto, Canada
6. Department of Orthopedic Surgery, Faculty of Medicine, University of Toronto, Toronto, Canada