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Xu P, Choo YM, De La Rosa A, Leal WS.Xu P, et al.Proc Natl Acad Sci U S A. 2014 Nov 18;111(46):16592-7. doi: 10.1073/pnas.1417244111. Epub 2014 Oct 27.Proc Natl Acad Sci U S A. 2014.PMID: 25349401Free PMC article.