1. Maternal and Child Health Investment Program, Ministry of Health, Dodoma, Tanzania
2. School of Pharmacy, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
3. Department of Pediatrics, Muhimbili National Hospital, Dar es Salaam, Tanzania
4. School of Medicine and Dentistry, The University of Dodoma, Dodoma, Tanzania
5. School of Public Health and Social Services, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania