Sexually Transmitted Diseases, Viral

• Institute of Infections and Tropical Diseases University of Brescia — Brescia, Italy
• Hospital Arquitecto Marcide — Ferrol, A Coruña, Spain
• Hospital Generall de Alicante — Alicante, Alacant, Spain
• Hospital Universitari Germans Trias i Pujol — Badalona, Barcelona, Spain

Not specified

• Germans Trias i Pujol Hospital — Badalona, Barcelona, Spain
• Hospital de la Vall d'Hebron — Barcelona, Spain
• Hospital de Mataró — Mataró, Barcelona, Spain
• Hospital Virgen de las Nieves — Granada, Spain

• Lifelong AIDS Alliance — Seattle, Washington, United States
• Madison Clinic, Harborview Medical Center — Seattle, Washington, United States

• Cousins Center for Psychoneuroimmunology, UCLA — Los Angeles, California, United States

• Swami Vivekananda Yoga Anusandhana Samsthana (SVAYSA) — Bangalore, India

• San Francisco Veteran's Affairs Medical Center — San Francisco, California, United States
• PositiveHealth Practice — San Francisco, California, United States
• Jackson Park Hospital — Chicago, Illinois, United States
• Boston Living Center — Boston, Massachusetts, United States

• Melbourne Sexual Health Centre — Carlton, Victoria, Australia

• NeurogesX Investigational Site — Huntsville, Alabama, United States
• NeurogesX Investigational Site — Mobile, Alabama, United States
• NeurogesX Investigational Site — Phoenix, Arizona, United States
• NeurogesX Investigational Site — Fountain Valley, California, United States

• Virology Research Clinic — Seattle, Washington, United States