Sexually transmitted diseases and the gay male.
D000163:Acquired Immunodeficiency Syndrome / Q000635:transmission*; D006069:Gonorrhea / Q000635:transmission*; D006509:Hepatitis B / Q000635:transmission*; D006716:Homosexuality; D006801:Humans; D008297:Male; D012749:Sexually Transmitted Diseases / Q000453:epidemiology*; D013587:Syphilis / Q000635:transmission*