title: Epidemiology of anorectal disease: a review.
mesh_terms: D001004:Anus Diseases / Q000453:epidemiology*; D004739:England; D006716:Homosexuality; D006801:Humans; D008297:Male; D012002:Rectal Diseases / Q000453:epidemiology*; D012749:Sexually Transmitted Diseases / Q000453:epidemiology