[1] Univ British Columbia, British Columbia Ctr Substance Use, 400-1045 Howe St, Vancouver, BC V6Z 2A9, Canada
[2] Univ British Columbia, Dept Med, Vancouver, BC, Canada
[3] Univ British Columbia, Sch Nursing, Vancouver, BC, Canada
[4] Univ British Columbia, Sch Nursing, Res, Vancouver, BC, Canada
[5] Univ British Columbia, Vancouver, BC, Canada
[6] Univ British Columbia, Sch Populat & Publ Hlth, Vancouver, BC, Canada
[7] Univ British Columbia, British Columbia Ctr Dis Control, Vancouver, BC, Canada
[8] Univ Westminster, Coll Liberal Arts & Sci, Hlth Studies, London, England
[9] Univ Westminster, Coll Liberal Arts & Sci, London, England
[10] Univ New South Wales, Pract Justice Initiat, Sociol, Sydney, NSW, Australia
[11] Univ New South Wales, Pract Justice Initiat, Sydney, NSW, Australia
[12] British Columbia Ctr Dis Control, Vancouver, BC, Canada