研究人员称，63名健康受试者中，只有两个人有可能会有这种异常现象。
The researchers said that only 2 of 63 healthy subjects would be expected to have such abnormalities.
该研究显示，这种异常现象存在的原因各种各样：或许是作为安慰剂，或者是为了社会联系。
The study suggests multiple reasons for such anomalies to exist: perhaps superstition is adaptive as a placebo, or for social bonding.
大多数明显的创始人突变都是隐性的，可以解释这种明显的异常现象：只有双亲都拥有受影响基因副本的人才会生病。
This apparent anomaly is partially explained by the fact that most founder mutations are recessive: only a person with copies of the affected gene from both parents becomes ill.
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