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Brewer BJ, Fangman WL.Brewer BJ, et al.Proc Natl Acad Sci U S A. 1994 Apr 12;91(8):3418-22. doi: 10.1073/pnas.91.8.3418.Proc Natl Acad Sci U S A. 1994.PMID: 8159762Free PMC article.