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Dolcos F, LaBar KS, Cabeza R.Dolcos F, et al.Proc Natl Acad Sci U S A. 2005 Feb 15;102(7):2626-31. doi: 10.1073/pnas.0409848102. Epub 2005 Feb 9.Proc Natl Acad Sci U S A. 2005.PMID: 15703295Free PMC article.