2006年发表在JournalofNeurogenetics的
份研究中，多伦多贝加斯医院的心理学家招募
由姐弟俩和
们的亲生父
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.
