1. Division of HIV/AIDS Prevention, National Center for HIV, Viral Hepatitis, STD, and TB Prevention (NCHHSTP), Centers for Disease Control and Prevention (CDC), Atlanta, Georgia 30333.
2. Projet RETRO-CI, Abidjan, Côte d'Ivoire.
3. Service des Maladies Infectieuses et Tropical, University Teaching Hospital, Treichville, Côte d'Ivoire.
4. Global AIDS Program, National Center for HIV, Viral Hepatitis, STD, and TB Prevention (NCHHSTP), Centers for Disease Control and Prevention (CDC), Atlanta, Georgia 30333.