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Ferris SD, Sage RD, Huang CM, Nielsen JT, Ritte U, Wilson AC.Ferris SD, et al. Among authors: sage rd.Proc Natl Acad Sci U S A. 1983 Apr;80(8):2290-4. doi: 10.1073/pnas.80.8.2290.Proc Natl Acad Sci U S A. 1983.PMID: 6300907Free PMC article.