[1] Ryerson Univ, Dept Psychol, 105 Bond St, Toronto, ON M5B 1Y3, Canada
[2] McGill Univ, Dept Epidemiol Biostat & Occupat Hlth, Montreal, PQ, Canada
[3] Univ Victoria, Sch Publ Hlth & Social Policy, Victoria, BC, Canada
[4] British Columbia Ctr Excellence HIV AIDS, Epidemiol & Populat Hlth Program, Vancouver, BC, Canada
[5] Univ Toronto, Dalla Lana Sch Publ Hlth, Toronto, ON, Canada
[6] Univ Windsor, Dept Sociol Anthropol & Criminol, Windsor, ON, Canada
[7] Univ Toronto, Factor Inwentash Fac Social Work, Toronto, ON, Canada
[8] Univ British Columbia, Fac Med, Sch Populat & Publ Hlth, Vancouver, BC, Canada
[9] Community Based Res Ctr Gay Mens Hlth, Vancouver, BC, Canada