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如果以“嵌合体胚胎是否继续发育”为标准，这次的人-猴胚胎没有踩到伦理的红线。这些胚胎从受精起就只在体外培养，而且只培养到第 20 天。通讯作者之一、美国索尔克生物研究所的胡安·卡洛斯·伊斯皮苏亚·贝尔蒙特（Juan Carlos Izpisua Belmonte）表示，他们的目标不是制造任何怪物，他们也没有这么做。
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