1. Centers for Disease Control and Prevention, Atlanta, Georgia 30333
2. Department of Medical Sciences, Ministry of Public Health, Nonthaburi, 11000 Thailand
3. TB/HIV Research Laboratory, Brown University School of Medicine, Providence, Rhode Island 02912
4. Centers for Disease Control and Prevention, Atlanta, Georgia 30333; HIV/AIDS Collaboration, Nonthaburi, 11000 Thailand
5. Emory University, Atlanta, Georgia 30322
6. HIV/AIDS Collaboration, Nonthaburi, 11000 Thailand