求英文文献，谢谢了

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http://www.ncbi.nlm.nih.gov/pubm ... mbryo%20development0 F8 p# K! p# E1 g9 ~2 m
Reprod Fertil Dev. 2011 Dec;24(1):126.+ n* L* o: i1 t7 {" X
treatment of donor cells with Xenopus oocyte extract enhanced somatic cell nuclear transfer embryo development.
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