1 Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA. Electronic address: rosemary.morgan@jhu.edu.
2 Women in Global Health, Washington, DC, USA.
3 Health Systems and Research Ethics Department, KEMRI-Wellcome Trust Research Programme, Nairobi, Kenya.
4 UNAIDS, Geneva, Switzerland.
5 School of Public Health, University of the Western Cape, Bellville, South Africa.