[1] Columbia Univ, Dept Obstet & Gynecol, New York, NY 10027 USA
[2] Int Rescue Comm, Kabul, Afghanistan
[3] US Mil HIV Res Program, Walter Reed Army Inst Res, Rockville, MD USA
[4] Empiristat Corp, Mt Airy, NC USA
[5] USN, Mil Res Unit 3, Cairo, Egypt
[6] Univ Calif San Diego, Div Int Hlth & Cross Cultural Med, La Jolla, CA 92093 USA