1Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, USA
2Department of Medicine, University of California, San Francisco, USA
3Center of Expertise in Women’s Health and Empowerment, University of California Global Health Institute, San Francisco, USA
4Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg, South Africa
5Centre for Microbiology Research, Kenya Medical Research Institute, Nairobi, Kenya
6Department of Social and Behavioral Sciences, School of Nursing, University of California, San Francisco, USA
7UCSF School of Nursing, San Francisco, USA