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Guttridge KL, Smith LD, Miledi R.Guttridge KL, et al.Proc Natl Acad Sci U S A. 1995 Feb 28;92(5):1297-301. doi: 10.1073/pnas.92.5.1297.Proc Natl Acad Sci U S A. 1995.PMID: 7877971Free PMC article.