In this Oct. 9, 2018, file photo, an embryo receives a small dose of Cas9 protein and PCSK9 sgRNA in a sperm injection microscope in a laboratory in Shenzhen in southern China's Guangdong province, during work by scientist He Jiankui's team. On Thursday, Feb. 7, 2019, a Stanford University official said that the school has started a review of interactions that some faculty members had with He, who claims to have helped make gene-edited babies. (AP Photo/Mark Schiefelbein) ** FILE **
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