[1] MRC, Hlth Syst Res Unit, Cape Town, South Africa
[2] Univ Stellenbosch, Dept Psychol, Cape Town, South Africa
[3] MRC, Hlth Syst Res Unit, Cape Town, South Africa
[4] Univ Western Cape, Sch Publ Hlth, Cape Town, South Africa
[5] MRC, Burden Dis Res Unit, Cape Town, South Africa
[6] Univ Cape Town, Sch Child & Adolescent Hlth, ZA-7925 Cape Town, South Africa
[7] Univ Cape Town, Groote Schuur Hosp, ZA-7925 Cape Town, South Africa
[8] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Int Hlth, Baltimore, MD USA
[9] Ctr Hlth & Populat Res, Dhaka, Bangladesh
[10] Univ Edinburgh, Sch Med, Dept Publ Hlth Sci, Edinburgh, Midlothian, Scotland
[11] Univ Split, Sch Med, Split, Croatia