[1] Ctr Hosp Univ Montreal, Res Ctr, Montreal, PQ, Canada
[2] Univ Montreal, Fac Med, Dept Psychiat & Addict, Montreal, PQ, Canada
[3] Ctr Addict & Mental Hlth, Translat Addict Res Lab, Toronto, ON, Canada
[4] Univ Toronto, Dept Psychiat, Toronto, ON, Canada
[5] Univ Montreal, Fac Med, Dept Family Med, Montreal, PQ, Canada
[6] Univ Alberta, Edmonton Clin Hlth Acad, Sch Publ Hlth, Edmonton, AB, Canada
[7] St Pauls Hosp, British Columbia Ctr Subst Use, Vancouver, BC, Canada
[8] Univ British Columbia, Fac Med, Dept Med, Vancouver, BC, Canada
[9] Ctr Addict & Mental Hlth, Inst Mental Hlth Policy Res, 2035-33 Russell St, Toronto, ON M5S 2S1, Canada