Oral and anal high-risk human papilloma virus infection in HIV-positive men who have sex with men over a 24-month longitudinal study: complexity and vaccine implications. - Parisi, Saverio Giuseppe; Basso, Monica; Scaggiante, Renzo; Andreis, Samantha; Mengoli, Carlo; Cruciani, Mario; Del Vecchio, Claudia; Menegotto, Nicola; Zago, Daniela; Sarmati, Loredana; Andreoni, Massimo; Palù, Giorgio (BMC Public Health, 2019)