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Cartwright JH, Checa AG, Escribano B, Sainz-Díaz CI.Cartwright JH, et al. Among authors: checa ag.Proc Natl Acad Sci U S A. 2009 Jun 30;106(26):10499-504. doi: 10.1073/pnas.0900867106. Epub 2009 Jun 15.Proc Natl Acad Sci U S A. 2009.PMID: 19528636Free PMC article.