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Hansen LJ, Reddy MK, Reddy JK.Hansen LJ, et al. Among authors: reddy mk, reddy jk.Proc Natl Acad Sci U S A. 1983 Jul;80(14):4379-83. doi: 10.1073/pnas.80.14.4379.Proc Natl Acad Sci U S A. 1983.PMID: 6576343Free PMC article.