[1] Generalitat Catalunya, Agencia Salut Publ Catalunya ASPCAT, Ctr Estudis Epidemiol Infecc Transmissio Sexual &, Barcelona, Spain
[2] Ctr Invest Biomed Red Epidemiol & Salud Publ CIBE, Barcelona, Spain
[3] Univ Autonoma Barcelona, Fac Med, Dept Pediat Obstet & Ginecol & Med Prevent & Salu, E-08193 Barcelona, Spain
[4] Stop Sida, Barcelona, Spain
[5] Serv Sociales & Igualdad, Minist Sanidad, Madrid, Spain