title: No positive tests for syphilis in 6 years of observation among heroin drug users in north-eastern Italy.
authors.forename: Fabio
authors.initials: F
authors.lastname: Lugoboni
authors.forename: Gianluca
authors.initials: G
authors.lastname: Quaglio
authors.forename: Paolo
authors.initials: P
authors.lastname: Mezzelani
authors.forename: Alessandro
authors.initials: A
authors.lastname: Lechi
mesh_terms: D000328:Adult; D005260:Female; D003932:Heroin; D006801:Humans; D007558:Italy / Q000453:epidemiology; D008297:Male; D016036:Seroepidemiologic Studies; D011477:Sex Work / Q000208:ethnology; D015819:Substance Abuse, Intravenous / Q000150:complications* / Q000453:epidemiology; D013587:Syphilis / Q000150:complications* / Q000453:epidemiology; D013588:Syphilis Serodiagnosis
chemical_list: D003932:Heroin