Sexually Transmitted Diseases

• Hospital General Universitario de Alicante — Alicante, Spain
• Hospital Sant Creu i Sant Pau — Barcelona, Spain
• Hospital Clinico y Provincial — Barcelona, Spain
• Hospital Universitario Reina Sofia — Córdoba, Cordoba, Spain

• Bugando Medical Center — Mwanza, Mwanza Region, Tanzania

• Hospital de San Juan — San Juan, Alicante, Spain
• Hospital de Torrevieja — Torrevieja, Alicante, Spain
• Hospital de Villajoyosa — Villajoyosa, Alicante, Spain
• Hospital de Torrecárdenas — Almería, Spain

Not specified

• Department of Medical Epidemiology and Biostatistics, Karolinska Institutet — Stockholm, Sweden

• Site Ref # / Investigator 4074 — León, Guanajauto, Mexico
• Site Ref # / Investigator 4049 — Mexico City, Mexico
• Site Ref # / Investigator 4050 — Mexico City, Mexico
• Site Ref # / Investigator 4051 — Mexico City, Mexico

• Nova Southeastern University (Miami Office) — Miami, Florida, United States

• Merksem, Belgium

• Merksem, Belgium

• Hospital General Universitario Gregorio Marañón — Madrid, Spain
• Hospital Ramón y Cajal — Madrid, Spain
• Hospital Universitario 12 de Octubre — Madrid, Spain
• Hospital Universitario La Paz — Madrid, Spain