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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).
Lorente N, Fernàndez-López L, Fuertes R, Rojas Castro D, Pichon F, Cigan B, Chanos S, Meireles P, Lucas R, Morel S, Slaaen Kaye P, Agustí C, Klavs I, Platteau T, Casabona J; Euro HIV EDAT Study Group. Lorente N, et al. BMJ Open. 2016 Jul 13;6(7):e011314. doi: 10.1136/bmjopen-2016-011314. BMJ Open. 2016. PMID: 27412103 Free PMC article.