[1] Univ Calif Los Angeles, David Geffen Sch Med, South Amer Program HIV Prevent Res, 10833 Le Conte Ave, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, David Geffen Sch Med, 10833 Le Conte Ave,CHS 37-121, Los Angeles, CA 90095 USA
[3] Univ Toronto, Dalla Lana Sch Publ Hlth, Toronto, ON, Canada
[4] Univ Peruana Ciencias Aplicadas, Escuela Med, Lima, Peru
[5] Asociac Civil Via Libre, Lima, Peru
[6] UT Hlth, McGovern Med Sch, Dept Internal Med, Div Infect Dis, Houston, TX USA
[7] Univ Calif Los Angeles, David Geffen Sch Med, Dept Med, Div Infect Dis, Los Angeles, CA 90095 USA