Sexually Transmitted Diseases, Viral

• Health and Social Development Foundation — Sofia, Bulgaria
• Institute of Sociology, Hungarian Academy of Sciences — Budapest, Hungary
• Botkin Hospital for Infectious Diseases — Saint Petersburg, Russia

Not specified

• Johns Hopkins Center for American Indian Health — Baltimore, Maryland, United States

• Johns Hopkins HIV Clinic — Baltimore, Maryland, United States

• Dalhousie University — Halifax, Nova Scotia, Canada
• University of Ottawa / Ottawa Hospital Research Institute — Ottawa, Ontario, Canada
• University of Toronto — Toronto, Ontario, Canada
• McGill University — Montreal, Quebec, Canada

• Baltimore VA Drug Dependency Program — Baltimore, Maryland, United States
• Program for Alcohol and Other Drug Dependencies — Baltimore, Maryland, United States
• Man Alive, Inc. — Baltimore, Maryland, United States
• New Hope Treatment Center — Baltimore, Maryland, United States

• Vaccine Evaluation Centre — Vancouver, British Columbia, Canada

• GSK Investigational Site — Los Angeles, California, United States
• GSK Investigational Site — San Rafael, California, United States
• GSK Investigational Site — Fort Lauderdale, Florida, United States
• GSK Investigational Site — Jacksonville, Florida, United States

• VA San Diego Healthcare System, San Diego, CA — San Diego, California, United States
• VA Greater Los Angeles Healthcare System, West Los Angeles, CA — West Los Angeles, California, United States

• Southern Arizona VA Health Care System, Tucson, AZ — Tucson, Arizona, United States
• VA Palo Alto Health Care System, Palo Alto, CA — Palo Alto, California, United States
• VA San Diego Healthcare System, San Diego, CA — San Diego, California, United States
• VA Greater Los Angeles Healthcare System, West Los Angeles, CA — West Los Angeles, California, United States