求助文献三篇，谢谢诸位

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Osteochondral Interface Regeneration of Rabbit Mandibular Condyle With Bioactive Signal Gradients ; E" x; T+ x- X0 M$ j" ~
http://www.sciencedirect.com/science/article/pii/S0278239111000760
, M. o4 W& t: L& ?, F+ EHypertrophy in mesenchymal stem cell chondrogenesis: effect of TGF-beta isoforms and chondrogenic conditioning
) L8 N1 n. o0 k1 G- m9 g: p1 \' vhttp://www.ncbi.nlm.nih.gov/pubmed/20407224
+ {) s: ^! s% ^Hyaluronan and mesenchymal stem cells: from germ layer to cartilage and bone
3 x; u( Z/ a5 S# z& Zhttp://www.ncbi.nlm.nih.gov/pubmed/21196170

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