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Whitton JP, Hancock KE, Polley DB.Whitton JP, et al. Among authors: hancock ke.Proc Natl Acad Sci U S A. 2014 Jun 24;111(25):E2606-15. doi: 10.1073/pnas.1322184111. Epub 2014 Jun 9.Proc Natl Acad Sci U S A. 2014.PMID: 24927596Free PMC article.Clinical Trial.