1. Department of Global Health University of Washington Seattle WA USA
2. Department of Epidemiology University of Washington Seattle WA USA
3. HIV Department World Health Organization Geneva Switzerland
4. Family and Reproductive Health Cluster World Health Organization, Regional Office for Africa Ouagadougou Burkina Faso
5. HIV/Tuberculosis/Hepatitis Programme World Health Organization, Regional Office for Africa Lusaka Zambia
6. HIV Section UNICEF New York NY USA
7. Clinical Research Department London School of Hygiene and Tropical Medicine London United Kingdom