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Qin XX, Waite JH.Qin XX, et al. Among authors: waite jh.Proc Natl Acad Sci U S A. 1998 Sep 1;95(18):10517-22. doi: 10.1073/pnas.95.18.10517.Proc Natl Acad Sci U S A. 1998.PMID: 9724735Free PMC article.