题目内容
Dr. Becker et al. first identified and reported mouse stem cells in Nature in _________.
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Takahashi K & Yamanaka S published their entitled "Induction of pluripotent stem cells from mouse embryonic and adult fibroblast cultures by defined factors" in Cell in _______.
In general, the conversion to iPSCs has been low. e.g., the rate at which somatic cells were reprogrammed into iPSCs in Yamanaka's original mouse study was __________%.
Based on well-accepted international criteria, human embryo can be cultured in vitro until _______ days.
Which of the following are not stem cells?
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