1. Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
2. Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
3. Division of Biostatistics, Dalla Lana School of Public Health, Toronto, ON, Canada
4. Division of Epidemiology, Dalla Lana School of Public Health, Toronto, ON, Canada
5. Populations & Public Health Research Program, Institute for Clinical Evaluative Sciences, Toronto, ON, Canada
6. Research and Ethics Program, Public Health Ontario, Toronto, ON, Canada
7. Division of Clinical Public Health, Dalla Lana School of Public Health, Toronto, ON, Canada