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Diener DR, Curry AM, Johnson KA, Williams BD, Lefebvre PA, Kindle KL, Rosenbaum JL.Diener DR, et al.Proc Natl Acad Sci U S A. 1990 Aug;87(15):5739-43. doi: 10.1073/pnas.87.15.5739.Proc Natl Acad Sci U S A. 1990.PMID: 2377611Free PMC article.