1. Associate Professor, Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA. Correspondence:
2. Research Associate, Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
3. Research Assistant, Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
4. Technical Officer, Department of Antimicrobial Resistance, World Health Organization, Geneva, Switzerland
5. Scientist, Department of Sexual and Reproductive Health and Research, World Health Organization, (includes the UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction – HRP), Geneva, Switzerland