title: [In Process Citation].
authors.affiliation: Abteilung für Infektionsepidemiologie, Robert-Koch-Institut, Postfach 65 02 61, D-13302, Berlin, Deutschland, hamoudao@rki.de.
authors.forename: Osamah
authors.initials: O
authors.lastname: Hamouda
mesh_terms: D003430:Cross-Sectional Studies; D005858:Germany; D015658:HIV Infections / Q000453:epidemiology* / Q000635:transmission*; D018451:Homosexuality, Male; D006801:Humans; D015994:Incidence; D008297:Male; D013587:Syphilis / Q000453:epidemiology / Q000635:transmission