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" Homosexuality : A Psychoanalytic Study of Male Homosexuals " , a large-scale 1962 study of homosexuality by Irving Bieber and other authors , was used to justify inclusion of the disorder as a supposed pathological hidden fear of the opposite sex caused by traumatic parent–child relationships .
 person: Irving Bieber
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Irving Bieber