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Isaacs EB, Vargha-Khadem F, Watkins KE, Lucas A, Mishkin M, Gadian DG.Isaacs EB, et al.Proc Natl Acad Sci U S A. 2003 Oct 28;100(22):13060-3. doi: 10.1073/pnas.1233825100. Epub 2003 Oct 10.Proc Natl Acad Sci U S A. 2003.PMID: 14555756Free PMC article.