Sexual behaviour reported by a sample of Italian MSM before and after HIV diagnosis oleh Laura Camoni, Ivano Dal Conte, Vincenza Regine, Anna Colucci, Monica Chiriotto, Vincenzo Vullo, Marina Sebastiani, Laura Cordier, Rosangela Beretta, Josè Ramon Fiore, Mariagrazia Tateo, Mario Affronti, Giuseppina Cassarà, Barbara Suligoi