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Khananshvili D, Gromet-Elhanan Z.Khananshvili D, et al.Proc Natl Acad Sci U S A. 1985 Apr;82(7):1886-90. doi: 10.1073/pnas.82.7.1886.Proc Natl Acad Sci U S A. 1985.PMID: 2858854Free PMC article.