The three kings: Harry Benjamin, John Money, Robert Stoller.
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D005783:Gender Identity; D049673:History, 20th Century; D006801:Humans; D008297:Male; D008611:Mentors / Q000266:history*; D011570:Psychiatry / Q000266:history; D011572:Psychoanalysis / Q000266:history; D019529:Sexuality / Q000266:history*; D014189:Transsexualism / Q000266:history* / Q000601:surgery; D014481:United States