1. MRC/UVRI Uganda Research Unit on AIDS, Entebbe, Uganda.
2. Uganda Virus Research Institute/IAVI HIV Vaccine Program, Entebbe, Uganda.
3. London School of Hygiene and Tropical Medicine, London, United Kingdom.
4. International AIDS Vaccine Initiative, New York, New York.
5. School of International Development, University of East Anglia, Norwich, United Kingdom.