1. Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle, Washington.
2. Center for Epidemiology and Biostatistics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.
3. Hubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, Georgia.
4. The Ministry of Health Counseling Unit, Chainama Hills Hospital, Lusaka, Zambia.
5. Department of Obstetrics and Gynecology, University Teaching Hospital, Lusaka, Zambia.
6. Santa Clara Medical Center, San Jose, California.
7. Biostatistics Unit of the Cancer Research Center, University of Alabama at Birmingham, Alabama.
8. Zambia-Emory HIV Research Project, Rollins School of Public Health, Emory University, Atlanta, Georgia.