1. a Centre for Addiction and Mental Health , Toronto, Canada
2. b Department of Pharmacology , University of Toronto , Ontario, Canada
3. d Addiction Medicine, Vancouver Coastal Health , British Columbia, Canada
4. e Providence Health Care , Vancouver, British Columbia, Canada
5. f Department of Health Care and Epidemiology , University of British Columbia , Canada
6. c Faculty of Pharmacy and Department of Psychiatry , University of Toronto , Ontario, Canada