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Sherwood CC, Gordon AD, Allen JS, Phillips KA, Erwin JM, Hof PR, Hopkins WD.Sherwood CC, et al.Proc Natl Acad Sci U S A. 2011 Aug 9;108(32):13029-34. doi: 10.1073/pnas.1016709108. Epub 2011 Jul 25.Proc Natl Acad Sci U S A. 2011.PMID: 21788499Free PMC article.