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al-Ubaidi MR, Hollyfield JG, Overbeek PA, Baehr W.al-Ubaidi MR, et al. Among authors: overbeek pa.Proc Natl Acad Sci U S A. 1992 Feb 15;89(4):1194-8. doi: 10.1073/pnas.89.4.1194.Proc Natl Acad Sci U S A. 1992.PMID: 1311085Free PMC article.