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Peña KL, Castel SE, de Araujo C, Espie GS, Kimber MS.Peña KL, et al. Among authors: kimber ms.Proc Natl Acad Sci U S A. 2010 Feb 9;107(6):2455-60. doi: 10.1073/pnas.0910866107. Epub 2010 Jan 25.Proc Natl Acad Sci U S A. 2010.PMID: 20133749Free PMC article.