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Warbrick-Smith J, Behmer ST, Lee KP, Raubenheimer D, Simpson SJ.Warbrick-Smith J, et al. Among authors: simpson sj.Proc Natl Acad Sci U S A. 2006 Sep 19;103(38):14045-9. doi: 10.1073/pnas.0605225103. Epub 2006 Sep 12.Proc Natl Acad Sci U S A. 2006.PMID: 16968774Free PMC article.