1. Magee-Womens Research Institute, Pittsburgh, Pennsylvania 15213, United States
2. Department
of Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh 15260, Pennsylvania, United States
3. International Partnership for Microbicides, Silver Spring, Maryland 20910, United States
4. Department
of Obstetrics, Gynecology and Reproductive Sciences, School of Medicine, University of Pittsburgh, Pittsburgh 15260, Pennsylvania, United States