1. Division of Orthopaedic Surgery, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
2. Division of Orthopaedic Surgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
3. Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
4. ICES (formerly Institute for Clinical Evaluative Sciences), Toronto, Ontario, Canada
5. Institute of Health Policy, Management, and Evaluation, University of Toronto, Toronto, Ontario, Canada