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Pondel MD, Murphy S, Pearson L, Craddock C, Proudfoot NJ.Pondel MD, et al. Among authors: murphy s.Proc Natl Acad Sci U S A. 1995 Aug 1;92(16):7237-41. doi: 10.1073/pnas.92.16.7237.Proc Natl Acad Sci U S A. 1995.PMID: 7638173Free PMC article.