1 Faculty of Medical and Health Sciences, University of Auckland, Auckland 1023, New Zealand; Department of Psychiatry, University of Toronto, Toronto, ON, Canada; Centre for Addiction and Mental Health, Toronto, ON, Canada. Electronic address: benedikt.fischer@utoronto.ca.
2 Centre for Addiction and Mental Health, Toronto, ON, Canada; Centre for Applied Research in Mental Health and Addiction, Faculty of Health Sciences, Simon Fraser University, Vancouver, BC, Canada.
3 British Columbia Centre for Disease Control, Vancouver, BC, Canada; School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada.