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Hunt RD, Blake BJ, Chalifoux LV, Sehgal PK, King NW, Letvin NL.Hunt RD, et al. Among authors: sehgal pk.Proc Natl Acad Sci U S A. 1983 Aug;80(16):5085-9. doi: 10.1073/pnas.80.16.5085.Proc Natl Acad Sci U S A. 1983.PMID: 6576377Free PMC article.