COBA-Cohort: a prospective cohort of HIV-negative men who have sex with men, attending community-based HIV testing services in five European countries (a study protocol)

by Lorente, Nicolas, Fernàndez-López, Laura, Fuertes, Ricardo, Rojas Castro, Daniela, Pichon, François, Cigan, Bojan, Chanos, Sophocles, Meireles, Paula, Lucas, Raquel, Morel, Stéphane, Slaaen Kaye, Per, Agustí, Cristina, Klavs, Irena, Platteau, Tom, Casabona, Jordi
Published in BMJ Open (2016)