Sexual practices, sexually transmitted diseases, and the incidence of anal cancer.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001005:Anus Neoplasms / Q000453:epidemiology* / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012725:Sexual Behavior; D012749:Sexually Transmitted Diseases / Q000150:complications*