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Pardo-Vazquez JL, Leboran V, Acuña C.Pardo-Vazquez JL, et al.Proc Natl Acad Sci U S A. 2009 Nov 3;106(44):18815-9. doi: 10.1073/pnas.0910524106. Epub 2009 Oct 21.Proc Natl Acad Sci U S A. 2009.PMID: 19846763Free PMC article.