P3.135 High Prevalence, Incidence and Clearance of Anal High-Grade Squamous Intraepithelial Lesions (HSIL): Early Evidence from a Natural History Study in Homosexual Men
P3.135 High Prevalence, Incidence and Clearance of Anal High-Grade Squamous Intraepithelial Lesions (HSIL): Early Evidence from a Natural History Study in Homosexual Men