Affiliation: | 1. Department of Obstetrics and Gynaecology, Bugando Medical Centre and Teaching Hospital, , Mwanza, Tanzania;2. Institute for International Programs, Johns Hopkins Bloomberg School of Public Health, , Baltimore, MD, USA;3. Department of Reproductive Health and Research, World Health Organization, , Geneva, Switzerland;4. Department of Infectious Diseases Epidemiology, London School of Hygiene and Tropical Medicine, , London, UK |