1. Division of General Internal Medicine and Clinical Epidemiology and Osteoporosis Program, University Health Network, Toronto, Ontario, Canada
2. Geriatric Program, Toronto Rehabilitation Institute, University of Toronto, Toronto, Ontario, Canada
3. Department of Medicine, University of Toronto, Toronto, Ontario, Canada
4. Department of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada
5. Institute for Clinical Evaluative Sciences, Toronto, Ontario, Canada
6. Department of Radiation Oncology, University of Toronto, Toronto, Ontario, Canada
7. Department of Surgery, University of Toronto, Toronto, Ontario, Canada