title: Acquired immune deficiency syndrome--an overview.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000145:classification / Q000453:epidemiology / Q000209:etiology; D006800:Deltaretrovirus Infections / Q000145:classification; D006716:Homosexuality; D006801:Humans; D008297:Male; D009894:Opportunistic Infections / Q000453:epidemiology; D014481:United States