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Young HS, McCauley DJ, Dunbar RB, Dirzo R.Young HS, et al. Among authors: dunbar rb.Proc Natl Acad Sci U S A. 2010 Feb 2;107(5):2072-7. doi: 10.1073/pnas.0914169107. Epub 2010 Jan 19.Proc Natl Acad Sci U S A. 2010.PMID: 20133852Free PMC article.
Roark EB, Guilderson TP, Dunbar RB, Fallon SJ, Mucciarone DA.Roark EB, et al. Among authors: dunbar rb.Proc Natl Acad Sci U S A. 2009 Mar 31;106(13):5204-8. doi: 10.1073/pnas.0810875106. Epub 2009 Mar 23.Proc Natl Acad Sci U S A. 2009.PMID: 19307564Free PMC article.