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Ffrench-Constant RH, Mortlock DP, Shaffer CD, MacIntyre RJ, Roush RT.Ffrench-Constant RH, et al. Among authors: roush rt.Proc Natl Acad Sci U S A. 1991 Aug 15;88(16):7209-13. doi: 10.1073/pnas.88.16.7209.Proc Natl Acad Sci U S A. 1991.PMID: 1651498Free PMC article.