1 Division of General Internal Medicine and Centre for Research on Inner City Health, Li Ka Shing Knowledge Institute, St Michael's Hospital, Toronto, ON M5B 1W8, Canada; Department of Medicine and Institute of Health Policy, Management, and Evaluation, University of Toronto, Toronto, Canada. Electronic address: ahmed.bayoumi@utoronto.ca.
2 Dalla Lana School of Public Health, University of Toronto, Toronto, Canada; Centre for Addiction and Mental Health, Toronto, Canada.