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1 The differentiation of bone marrow mesenchymal stem cells into chondrocyte-like cells on poly-l-lactic acid (PLLA) scaffolds   Biomaterials
0 O/ X/ E6 J7 J" L/ {, fVolume 27, Issue 22, August 2006, Pages 4069-4078  
$ t" D/ A0 [  n* @# Q2 Stem cell regeneration of degenerated intervertebral discs: Current status
# X% E, M! B( o, SStephen M. Richardson and Judith A.  Hoyland Curr Pain Headache Rep. 2008 Apr;12(2):83-8.