A retrospective approach to syphilis in the 1970s.
D004334:Drug Administration Schedule; D005260:Female; D049673:History, 20th Century; D006716:Homosexuality; D006801:Humans; D008297:Male; D012189:Retrospective Studies; D012725:Sexual Behavior; D013587:Syphilis / Q000188:drug therapy / Q000453:epidemiology* / Q000266:history; D013588:Syphilis Serodiagnosis; D014481:United States