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Bütefisch CM, Davis BC, Wise SP, Sawaki L, Kopylev L, Classen J, Cohen LG.Bütefisch CM, et al. Among authors: cohen lg.Proc Natl Acad Sci U S A. 2000 Mar 28;97(7):3661-5. doi: 10.1073/pnas.97.7.3661.Proc Natl Acad Sci U S A. 2000.PMID: 10716702Free PMC article.