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Waxman DJ, Pampori NA, Ram PA, Agrawal AK, Shapiro BH.Waxman DJ, et al. Among authors: shapiro bh.Proc Natl Acad Sci U S A. 1991 Aug 1;88(15):6868-72. doi: 10.1073/pnas.88.15.6868.Proc Natl Acad Sci U S A. 1991.PMID: 1862110Free PMC article.