1. School of Public Health and Social Sciences, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
2. Tanzania Field Epidemiology and Laboratory Training Program, Dar es Salaam, Tanzania
3. Ministry of Health, Dodoma, Tanzania
4. Clinton Health Access Initiative, Tanzania
5. Ministry of Health, Directorate of Reproductive, Maternal and Child Health-Prevention of mother to child vertical transmission of HIV, Syphilis and Hepatitis B programme, Dodoma, Tanzania
6. College of Medicine, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania