求英文文献一篇，谢谢！

yanjie11678

Stage specific changes in expression of OCT4, CDX2, NANOG and GATA6 mRNA during blastocyst formation in the horse
3 r9 |; a  ?* Y- {, |: HAnimal Reproduction Science, 121S (1-2). s291-s292. ISSN 1873-22324 E1 L2 v- R8 K$ f( G; k& d
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