求助一篇文献，谢谢

fan0414

Human umbilical cord blood stem cells upregulate matrix metalloproteinase-2 in rats after spinal cord injury.
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Veeravalli KK, Dasari VR, Tsung AJ, Dinh DH, Gujrati M, Fassett D, Rao JS.1 ^* s4 r. R; ?  V8 i) p
http://www.ncbi.nlm.nih.gov/pubmed/19631747