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Chung BY, Miller WA, Atkins JF, Firth AE.Chung BY, et al. Among authors: firth ae.Proc Natl Acad Sci U S A. 2008 Apr 15;105(15):5897-902. doi: 10.1073/pnas.0800468105. Epub 2008 Apr 11.Proc Natl Acad Sci U S A. 2008.PMID: 18408156Free PMC article.