"Newly born mice are at the same developmental stage as the human fetus in late pregnancy, from which we infer that gene therapy performed during the embryo stage will very likely cause problems for the child later.
「剛出生的老鼠和人類懷孕末期的胎兒屬同樣的階段，以此推測，在胚胎階段做基因治療，將來孩子也很可能產生問題，不可不慎」，他說。