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Lewy AJ, Lefler BJ, Emens JS, Bauer VK.Lewy AJ, et al.Proc Natl Acad Sci U S A. 2006 May 9;103(19):7414-9. doi: 10.1073/pnas.0602425103. Epub 2006 Apr 28.Proc Natl Acad Sci U S A. 2006.PMID: 16648247Free PMC article.Clinical Trial.