急求文献两篇，谢谢大家！

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Artificial niche microarrays for probing single stem cell fate in high throughput& }+ P# O3 {5 K, p
http://www.nature.com/nmeth/journal/v8/n11/full/nmeth.1732.html8 ^# _( [+ t4 X1 f, }
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Investigating conversion of mechanical force into biochemical signaling in three-dimensional chondrocyte cultures; X4 ]3 u0 v+ J; |# \/ d
http://www.nature.com/nprot/journal/v4/n6/full/nprot.2009.63.html

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