[1] South African Med Res Council, Hlth Syst Res Unit, Cape Town, South Africa
[2] Univ Pretoria, Dept Paediat, Pretoria, South Africa
[3] Univ Western Cape, Sch Publ Hlth, Cape Town, South Africa
[4] Unicef, Hlth Sect, New York, NY USA
[5] Minist Hlth, PMTCT, AIDS & TB Unit, Paediat HIV Care Treatment, Harare, Zimbabwe
[6] Natl Aids & STI Control Program, Nairobi, Kenya
[7] Minist Hlth, HIV & AIDS Dept, Lilongwe, Malawi
[8] Univ Malawi, Coll Med, Dept Hlth Syst & Policy, Hlth Econ & Policy Unit, Lilongwe Campus, Lilongwe, Malawi
[9] Minist Hlth, Kampala, Uganda
[10] Unicef Pretoria, Unicef Nigeria, Pretoria, South Africa
[11] Unicef, Data & Analyt Sect, New York, NY USA
[12] Natl Dept Hlth, MCWHN, HIV AIDS, TB, Pretoria, South Africa