The gay bowel.
D000163:Acquired Immunodeficiency Syndrome / Q000150:complications / Q000175:diagnosis; D006716:Homosexuality; D006801:Humans; D008297:Male; D012002:Rectal Diseases / Q000175:diagnosis / Q000209:etiology*; D012749:Sexually Transmitted Diseases / Q000175:diagnosis / Q000209:etiology*