[1] San Diego State Univ, Div Epidemiol & Biostat, San Diego, CA 92182 USA
[2] Univ Cape Town, Sch Publ Hlth, Div Social & Behav Sci, Cape Town, South Africa
[3] Univ Calif Los Angeles, Dept Epidemiol, Los Angeles, CA USA
[4] Univ Western Cape, Fac Community & Hlth Sci, Bellville, South Africa
[5] Univ Cape Town, Fac Humanities, Dept Social Anthropol, Cape Town, South Africa
[6] Univ Cape Town, Div Epidemiol & Biostat, Observatory, South Africa
[7] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA USA
[8] Human Sci Res Council, Ctr Community Based Res, Pretoria, South Africa
[9] Univ Calif Los Angeles, David Geffen Sch Med, Dept Family Med, Los Angeles, CA USA
[10] Univ Cape Town, Dept Psychiat, Cape Town, South Africa
[11] Univ Calif Los Angeles, David Geffen Sch Med, Div Infect Dis, Los Angeles, CA USA
[12] San Diego State Univ, Sch Publ Hlth, 5500 Campanile Dr, San Diego, CA 92182 USA