1 Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada; MAP Centre for Urban Health Solutions, St Michael's Hospital, Department of Medicine, University of Toronto, Toronto, ON, Canada.
2 ICES, Toronto, ON, Canada.
3 Department of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada; ICES, Toronto, ON, Canada.
4 Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
5 MAP Centre for Urban Health Solutions, St Michael's Hospital, Department of Medicine, University of Toronto, Toronto, ON, Canada.
6 Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Department of Cardiac Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada. Electronic address: dcampbel@ucalgary.ca.