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Veldhuis JD, Carlson ML, Johnson ML.Veldhuis JD, et al. Among authors: johnson ml.Proc Natl Acad Sci U S A. 1987 Nov;84(21):7686-90. doi: 10.1073/pnas.84.21.7686.Proc Natl Acad Sci U S A. 1987.PMID: 2823271Free PMC article.