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Olsen JD, Sockalingum GD, Robert B, Hunter CN.Olsen JD, et al. Among authors: hunter cn.Proc Natl Acad Sci U S A. 1994 Jul 19;91(15):7124-8. doi: 10.1073/pnas.91.15.7124.Proc Natl Acad Sci U S A. 1994.PMID: 8041757Free PMC article.