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Davidson JJ, Ozçelik T, Hamacher C, Willems PJ, Francke U, Kilimann MW.Davidson JJ, et al. Among authors: ozcelik t.Proc Natl Acad Sci U S A. 1992 Mar 15;89(6):2096-100. doi: 10.1073/pnas.89.6.2096.Proc Natl Acad Sci U S A. 1992.PMID: 1372435Free PMC article.