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Buckley PA, Konigsberg IR.Buckley PA, et al. Among authors: konigsberg ir.Proc Natl Acad Sci U S A. 1977 May;74(5):2031-5. doi: 10.1073/pnas.74.5.2031.Proc Natl Acad Sci U S A. 1977.PMID: 266722Free PMC article.