[1] Ctr Estudis Epidemiol Infecc Transmissio Sexual &, Badalona, Spain
[2] Ctr Estudis Epidemiol Infecc Transmissio Sexual &, Inst Recerca Biomed Germans Trias & Pujol IGTP, Badalona, Spain
[3] Robert Koch Inst, Berlin, Germany
[4] Fac Ciencias Med Santa Casa Sao Paulo, Sao Paulo, Brazil
[5] Univ Chile, Escuela Salud Publ, Fac Med, Santiago, Chile
[6] Univ San Carlos, Guatemala City, Guatemala
[7] Maastricht Univ, Fac Psychol & Neurosci, Maastricht, Netherlands
[8] Univ Peruana Cayetano Heredia, Ctr Invest Interdisciplinaria Sexualida Sida & So, Lima, Peru
[9] Univ Porto, Inst Saude Publ, Porto, Portugal
[10] London Sch Hyg & Trop Med, Sigma Res, London, England