University of Melbourne, affiliation not provided to SSRN, University of Nairobi, University of Cape Town (UCT), University of Ghana Medical School, University of Nairobi, University of Melbourne, University of Cape Town, affiliation not provided to SSRN, Burnet Institute, University of Nairobi, University of Ghana Medical School, University of Ghana, University of Melbourne, Concept Foundation, Burnet Institute, University of Ghana, University of Melbourne - Centre for Epidemiology and Biostatistics, Concept Foundation, University of Melbourne, Burnet Institute, Korle Bu Teaching Hospital, Burnet Institute, University of Ghana Medical School, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Nagasaki University - Institute of Tropical Medicine, London School of Hygiene & Tropical Medicine, University of Cape Town (UCT), Concept Foundation, University of Ghana Medical School, University of Cape Town, Burnet Institute - Maternal, Child and Adolescent Health Program, University of Nairobi, University of Cape Town (UCT) and University of Melbourne