[1] Univ Cape Town, Div Cardiol, Cape Town, South Africa
[2] Emory Univ, Hubert Dept Global Hlth, Rollins Sch Publ Hlth, Atlanta, GA USA
[3] Fdn Cardioinfantil Inst Cardiol, Bogota, Colombia
[4] Brigham & Womens Hosp, Cardiol Div, Boston, MA USA
[5] Harvard Med Sch, Boston, MA USA
[6] Univ Cape Town, Cape Univ Body Imaging Ctr, Cape Town, South Africa
[7] Univ Cape Town, Dept Pediat & Child Hlth, Cape Town, South Africa
[8] Univ Cape Town, SA MRC Unit Child & Adolescent Hlth, Cape Town, South Africa
[9] Univ Cape Town, Dept Med, Cape Town, South Africa
[10] Univ Cape Town, Sch Publ Hlth & Family Med, Cape Town, South Africa
[11] Harvard Sch Publ Hlth, Dept Global Hlth & Populat, Boston, MA USA
[12] Harvard Sch Publ Hlth, Dept Epidemiol, Boston, MA USA
[13] Northwestern Univ, Dept Pediat, Div Pediat Infect Dis, Feinberg Sch Med, Chicago, IL USA
[14] Northwestern Univ, Dept Internal Med, Div Adult Infect Dis, Feinberg Sch Med, Chicago, IL USA
[15] Univ Cape Town, Cape Heart Inst, Cape Town, South Africa
[16] South African Med Res Council Extramural Unit Non, Cape Town, South Africa
[17] Massachusetts Gen Hosp, Boston, MA USA
[18] Africa Hlth Res Inst, Kwa Zulu, South Africa