1. Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis
2. Division of Pharmacotherapy and Experimental Therapeutics, School of Pharmacy
3. Department of Obstetrics and Gynecology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
4. UNC Project Malawi, Lilongwe, Malawi
5. Division of HIV Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
6. Department of Microbiology and Immunology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
7. Division of Reproductive Health, Centers for Disease Control and Prevention, Atlanta, Georgia
8. Institute for Genome Sciences
9. Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland
10. Department of Gynecology and Obstetrics, Emory University School of Medicine, Atlanta, Georgia
11. Center for Biomedical Research, Population Council, New York, New York, USA.