[1] Ctr Dis Control & Prevent, Div HIV AIDS Prevent, Natl Ctr HIV STD & TB Prevent, Atlanta, GA 30333 USA
[2] US Embasy, CDC HIV, Projet RETRO CI, Abidjan 1712 01, Cote Ivoire
[3] WHO, Div HIV AIDS, CH-1211 Geneva 27, Switzerland
[4] US Embassy, Ctr Dis Control & Prevent, Global AIDS Program, Kigali, Rwanda
[5] BOTUSA Project, Global AIDS Program, Gaborone, Botswana