[1] Univ British Columbia, Sch Nursing, T201-2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada
[2] British Columbia Ctr Subst Use, Vancouver, BC, Canada
[3] Wellstream Canadian Ctr Innovat Child & Youth Ment, Vancouver, BC, Canada
[4] Univ British Columbia, Dept Med, Vancouver, BC, Canada
[5] Univ Melbourne, Dept Nursing, Parkville, Vic, Australia
[6] Univ British Columbia, Sch Social Work, Vancouver, BC, Canada
[7] Univ Montreal, Ecole Sante Publ, Montreal, PQ, Canada
[8] Ctr Rech Sante Publ CReSP, Montreal, PQ, Canada