2006年发表在JournalofNeurogenetics
一份研究中，多伦多贝加斯医院心理学家招募了一个由姐弟俩
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.
