2006年发表在JournalofNeurogenetics的一份研究中，多伦多贝加斯医院的心理学家招募了一个由姐弟俩和他
的亲生父母组成的家庭。
In a 2006 study published in the Journal of Neurogenetics, psychologists at Baycrest Hospital in Toronto recruited families composed of an adult brother and sister and their biological parents.
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