1.Stem Cells Dev. 2005 Feb;14(1):44-54.# p- ^7 F( i) `& k% \* |) O' [) h
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Li W, Ferkowicz MJ, Johnson SA, Shelley WC, Yoder MC.; v$ c% `) E& Q% H1 ?4 G, N http://www.ncbi.nlm.nih.gov/pubmed/15725743