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Ip NY, Ho CK, Zigmond RE.Ip NY, et al. Among authors: zigmond re.Proc Natl Acad Sci U S A. 1982 Dec;79(23):7566-9. doi: 10.1073/pnas.79.23.7566.Proc Natl Acad Sci U S A. 1982.PMID: 6130526Free PMC article.