求助一篇文献，谢谢

fan0414

Regulating the balance between symmetric and asymmetric stem cell division in the developing brain
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7 K5 Z0 l6 T- V' v  _Gurdon Institute and Department of Physiology, University of Cambridge, Cambridge, UK.
; B, j$ f2 ~( {0 Q/ m. i http://www.ncbi.nlm.nih.gov/pubmed/21502820

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