2006年发表在JournalofNeurogenetics
份研究中，多伦多贝加斯医院心理学家招募了
姐弟俩和他
亲生父母
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.
