1 Institute for Clinical Evaluative Sciences, Toronto, ON M4N 3M5, Canada; Department of Family and Community Medicine, Toronto, ON, Canada; Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada; Public Health Ontario, Toronto, ON, Canada. Electronic address: jeff.kwong@utoronto.ca.
2 Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada; Public Health Ontario, Toronto, ON, Canada.
3 Institute for Clinical Evaluative Sciences, Toronto, ON M4N 3M5, Canada; Department of Medicine, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, ON, Canada; Department of Epidemiology & Community Medicine, University of Ottawa, Ottawa, ON, Canada.
4 Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.
5 Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada; Public Health Ontario, Toronto, ON, Canada.