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Shoyab M, Markham PD, Baluda MA.Shoyab M, et al. Among authors: baluda ma.Proc Natl Acad Sci U S A. 1975 Mar;72(3):1031-5. doi: 10.1073/pnas.72.3.1031.Proc Natl Acad Sci U S A. 1975.PMID: 165481Free PMC article.