Korle Bu Teaching Hospital, Korle Bu Teaching Hospital, University of California, San Francisco (UCSF) - Institute for Global Health Sciences, San Francisco State University, University of California, San Francisco (UCSF), University of California, San Francisco (UCSF) - Department of Obstetrics and Gynecology, University of Ghana Medical School, Navrongo Health Research Centre (NHRC), University of Health and Allied Sciences, University of Ghana Medical School, University of Ghana Medical School and University of California, San Francisco (UCSF) - Department of Epidemiology and Biostatistics