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Golding MC, Long CR, Carmell MA, Hannon GJ, Westhusin ME.Golding MC, et al.Proc Natl Acad Sci U S A. 2006 Apr 4;103(14):5285-90. doi: 10.1073/pnas.0600813103. Epub 2006 Mar 27.Proc Natl Acad Sci U S A. 2006.PMID: 16567624Free PMC article.