Nik-Hussein N N, Salcedo A H
ASDC J Dent Child. 1987 May-Jun;54(3):179-81.
There is now considerable evidence to support the theory that heredity is the origin of this anomaly. The condition in one of the twins described here was the mirror image of the condition of the other.
现在有大量证据支持遗传是这种异常起源的理论。这里描述的一对双胞胎中的一个的情况是另一个情况的镜像。
