1. Department of Obstetrics & Gynecology, Columbia University, New York, New York.
2. International Rescue Committee, Kabul, Afghanistan.
3. U.S. Military HIV Research Program, Rockville, Maryland.
4. Division of Global Public Health, University of California, San Diego, La Jolla, California.
5. Viral Research Program, U.S. Naval Ambulatory Medical Research Unit 3, Cairo, Egypt.