title: Gender, relationship length and the risk of heterosexual HIV transmission.
authors: A
authors: A
authors: Saracco
authors: A
authors: A
authors: Lazzarin
authors: M
authors: M
authors: Musicco
authors: M
authors: M
authors: Moroni
mesh_terms: D005260:Female; D015658:HIV Infections / Q000453:epidemiology / Q000635:transmission*; D015528:HIV Seroprevalence; D006801:Humans; D007558:Italy / Q000453:epidemiology; D008297:Male; D016017:Odds Ratio; D012307:Risk Factors; D012737:Sex Factors; D012725:Sexual Behavior; D013997:Time Factors