Sexually Transmitted Diseases, Viral

• NEA Clinic — Jonesboro, Arkansas, United States
• Northern Claifornia Research — Carmichael, California, United States
• California State University - Chico — Chico, California, United States
• Dermatology Research Associates — Los Angeles, California, United States

• Royal Free Hampstead NHS Trust — London, United Kingdom

• Radiant Research — Phoenix, Arizona, United States
• Pinellas County Health Dept, Florida Department of Health — St. Petersburg, Florida, United States
• Springfield Clinic, LLP — Springfield, Illinois, United States
• Minneapolis Medical Research Foundation — Minneapolis, Minnesota, United States

• Institute of Epidemiology, National Taiwan University — Taipei, Taiwan

• University of Alabama at Birmingham — Birmingham, Alabama, United States
• Novartis Investigative Site — Chandler, Arizona, United States
• Women's Health Research — Phoenix, Arizona, United States
• Quality of Life Medical & Research Center, LLC — Tucson, Arizona, United States

• Pfizer Investigational Site — Brussels, Belgium

• National Institutes of Health Clinical Center, 9000 Rockville Pike — Bethesda, Maryland, United States

Not specified

• GSK Investigational Site — Cypress, California, United States

• Avexa (co-ordinating sites in Australia and Argentina) — Melbourne, Victoria, Australia