1. Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
2. Department of Medicine, University of Toronto, Toronto, Ontario, Canada
3. Division of General Internal Medicine and Geriatrics, University Health Network, Toronto, Ontario, Canada
4. Division of Infectious Diseases, University Health Network, Toronto, Ontario, Canada
5. Department of Medicine and Division of Infectious Diseases, Michael Garron Hospital, Toronto, Ontario, Canada