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Maynard TM, Haskell GT, Peters AZ, Sikich L, Lieberman JA, LaMantia AS.Maynard TM, et al.Proc Natl Acad Sci U S A. 2003 Nov 25;100(24):14433-8. doi: 10.1073/pnas.2235651100. Epub 2003 Nov 12.Proc Natl Acad Sci U S A. 2003.PMID: 14614146Free PMC article.