2006年发表在JournalofNeurogenetics研究中,多伦多贝加斯医院心理学家招募了个由姐弟俩和们亲生父母组成家庭。
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.