[1] South African Med Res Council, Alcohol Tobacco & Other Drug Res Unit, ZA-7505 Tygerberg, South Africa
[2] Univ Cape Town, Div Addict Psychiat, Dept Psychiat & Mental Hlth, ZA-7701 Cape Town, South Africa
[3] Boston Med Ctr, Dept Med, Sect Infect Dis, Boston, MA 02119 USA
[4] Boston Univ, Sch Publ Hlth, Dept Biostat, Boston, MA 02119 USA
[5] Stellenbosch Univ, Dept Psychiat, ZA-7505 Tygerberg, South Africa
[6] Boston Univ, Sch Publ Hlth, Dept Epidemiol, Boston, MA 02119 USA
[7] Boston Univ, Sch Publ Hlth, Dept Biostat & Global Hlth, Boston, MA 02119 USA
[8] Stellenbosch Univ, South Africa Med Res Council TB Res, Ctr Excellence Biomed TB Res, Dept Sci & Innovat,Natl Res Fdn, ZA-7505 Tygerberg, South Africa