1. Department of Emergency Medicine, University of Ottawa, Ottawa, ON, Canada
2. School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
3. Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
4. Department of Emergency Medicine, The Ottawa Hospital, Ottawa, ON, Canada
5. Department of Emergency Medicine, Health Science North Research Institute, Northern Ontario School of Medicine, Sudbury, ON, Canada
6. Division of Geriatric Medicine, Department of Medicine, University of Ottawa, Ottawa, ON, Canada
7. Bruyere Research Institute, Ottawa, ON, Canada