1. Department of Medicine, University of Barcelona, Barcelona, Spain.
2. Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA.
3. Department of Family and Community Health, University of Pennsylvania, Pennsylvania, Philadelphia, USA.
4. Division of HIV/AIDS Prevention, Centers for Disease Control and Prevention (CDC), Atlanta, Georgia, USA.
5. Thailand Ministry of Public Health-US CDC Collaboration, Bangkok, Thailand.
6. Department of Medical Education, University of Alabama at Birmingham, Birmingham, Alabama, USA.
7. Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
8. FHI 360, Durham, North Carolina, USA.
9. Statistical Center for HIV/AIDS Research & Prevention, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA.
10. Microbicide Trials Network, Pittsburgh, Pennsylvania, USA.
11. Department of Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
12. Division of Clinical Pharmacology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
13. Division of AIDS/NIAID/NIH, Bethesda, Maryland, USA.
14. International Partnership for Microbicides, Silver Spring, Maryland, USA.