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Carmody RN, Weintraub GS, Wrangham RW.Carmody RN, et al. Among authors: wrangham rw.Proc Natl Acad Sci U S A. 2011 Nov 29;108(48):19199-203. doi: 10.1073/pnas.1112128108. Epub 2011 Nov 7.Proc Natl Acad Sci U S A. 2011.PMID: 22065771Free PMC article.