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Perry GA, Smith MF, Lucy MC, Green JA, Parks TE, MacNeil MD, Roberts AJ, Geary TW.Perry GA, et al. Among authors: macneil md.Proc Natl Acad Sci U S A. 2005 Apr 5;102(14):5268-73. doi: 10.1073/pnas.0501700102. Epub 2005 Mar 28.Proc Natl Acad Sci U S A. 2005.PMID: 15795381Free PMC article.