1. Department of Medicine, University of Toronto, Toronto, ON, Canada
2. Toronto Rehabilitation Institute, University Health Network, Toronto, ON, Canada
3. Institute of Medical Science, University of Toronto, Toronto, ON, Canada
4. Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
5. Department of Physical Education and Kinesiology, Brock University, St. Catharines, ON, Canada
6. Department of Surgery, University of Toronto, Toronto, ON, Canada