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Baker JB, Barsh GS, Carney DH, Cunningham DD.Baker JB, et al. Among authors: cunningham dd.Proc Natl Acad Sci U S A. 1978 Apr;75(4):1882-6. doi: 10.1073/pnas.75.4.1882.Proc Natl Acad Sci U S A. 1978.PMID: 306107Free PMC article.