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Welihinda AA, Tirasophon W, Green SR, Kaufman RJ.Welihinda AA, et al. Among authors: kaufman rj.Proc Natl Acad Sci U S A. 1997 Apr 29;94(9):4289-94. doi: 10.1073/pnas.94.9.4289.Proc Natl Acad Sci U S A. 1997.PMID: 9113982Free PMC article.