1. Women’s Global Health Imperative, RTI International, 351 California Street, Suite 500 San Francisco, CA 94104, United States of America.
2. Department of International Public Health, Liverpool School of Tropical Medicine, Liverpool, England.
3. Malawi-Liverpool-Wellcome Trust Clinical Research Programme, Blantyre, Malawi.
4. Centre for Sexual Health and HIV/AIDS Research, Harare, Zimbabwe.
5. Population Services International, Harare, Zimbabwe.
6. Department of HIV, World Health Organization, Geneva, Switzerland.
7. Department of Clinical Research, London School of Hygiene and Tropical Medicine, London, England.