1 Institute for Mental Health Policy Research, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.
2 Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada.
3 Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.
4 Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.
5 Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada.
6 Center for Interdisciplinary Addiction Research (ZIS), Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany.
7 Program on Substance Abuse & WHO CC, Public Health Agency of Catalonia, Barcelona, Spain.