1 Institute for Global Health Sciences, University of California San Francisco, San Francisco, CA, USA; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA. Electronic address: [email protected].
2 Center for Clinical Research, Kenya Medical Research Institute, Nairobi.
3 Maternal, Newborn and Child Health Centre of Excellence, School of Public Health, College of Health Sciences, Makerere University, Kampala, Uganda; Global Health Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden.