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Schanberg LE, Fleenor DE, Kurtzberg J, Haynes BF, Kaufman RE.Schanberg LE, et al. Among authors: kurtzberg j.Proc Natl Acad Sci U S A. 1991 Jan 15;88(2):603-7. doi: 10.1073/pnas.88.2.603.Proc Natl Acad Sci U S A. 1991.PMID: 1703303Free PMC article.