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Salser W, Fry K, Brunk C, Poon R.Salser W, et al. Among authors: fry k.Proc Natl Acad Sci U S A. 1972 Jan;69(1):238-42. doi: 10.1073/pnas.69.1.238.Proc Natl Acad Sci U S A. 1972.PMID: 4500550Free PMC article.
Scott ML, McKereghan K, Kaplan HS, Fry KE.Scott ML, et al. Among authors: fry ke.Proc Natl Acad Sci U S A. 1981 Jul;78(7):4213-7. doi: 10.1073/pnas.78.7.4213.Proc Natl Acad Sci U S A. 1981.PMID: 6270662Free PMC article.