1. Research Assistant, Centre for Addiction and Mental Health, Social and Epidemiological Research Department, Toronto, Ontario
2. Social Epidemiologist, Department of Family and Community Medicine, The University of Arizona, Tucson, Arizona
3. Research Scientist, Centre for Addiction and Mental Health, Social and Epidemiological Research Department, Toronto, Ontario; Assistant Professor, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario