[1] Generalitat Catalunya, Agencia Salut Publ Catalunya ASPC, Ctr Estudis Epidemiol Infecc Transmissio Sexual &, Barcelona, Spain
[2] Ctr Invest Biomed Red Epidemiol & Salud Publ CIBE, Madrid, Spain
[3] Univ Autonoma Barcelona, Dept Pediat Obstet & Ginecol & Med Prevent & Salu, Barcelona, Spain
[4] Generalitat Catalunya, Programa Prevencio Control & Atencio VIH ITS & He, Dept Salut, Barcelona, Spain