[1] Community Based Res Ctr Gay Mens Hlth, 1007-808 Nelson St, Vancouver, BC V6Z 2H2, Canada
[2] Univ British Columbia, Vancouver, BC, Canada
[3] British Columbia Ctr Dis Control, Vancouver, BC, Canada
[4] Ontario HIV Treatment Network, Toronto, ON, Canada
[5] British Columbia Ctr Excellence HIV AIDS, Vancouver, BC, Canada