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Vemuri GN, Eiteman MA, McEwen JE, Olsson L, Nielsen J.Vemuri GN, et al.Proc Natl Acad Sci U S A. 2007 Feb 13;104(7):2402-7. doi: 10.1073/pnas.0607469104. Epub 2007 Feb 7.Proc Natl Acad Sci U S A. 2007.PMID: 17287356Free PMC article.