求助关于大鼠胚胎干细胞文献一篇，已附上连接。谢谢

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题目：Establishment of Embryonic Stem Cells from Rat Blastocysts
+ N; \1 X0 L  `+ W* b# W 作者：Masaki Kawamata1 and Takahiro Ochiya1
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链接：
) y  h; y6 u' t# {, q: R: _( Rhttp://www.springerlink.com/content/u55676qg26853436/