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Cohen JE, Lee PR, Chen S, Li W, Fields RD.Cohen JE, et al. Among authors: chen s.Proc Natl Acad Sci U S A. 2011 Jul 12;108(28):11650-5. doi: 10.1073/pnas.1017576108. Epub 2011 Jun 22.Proc Natl Acad Sci U S A. 2011.PMID: 21697510Free PMC article.