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Fokas AS, Papatheodorou TS, Kister AE, Gelfand IM.Fokas AS, et al. Among authors: gelfand im.Proc Natl Acad Sci U S A. 2005 Nov 1;102(44):15851-3. doi: 10.1073/pnas.0507335102. Epub 2005 Oct 25.Proc Natl Acad Sci U S A. 2005.PMID: 16249331Free PMC article.