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Friedman NP, Miyake A, Young SE, DeFries JC, Corley RP, Hewitt JK.Friedman NP, et al.J Exp Psychol Gen. 2008 May;137(2):201-225. doi: 10.1037/0096-3445.137.2.201.J Exp Psychol Gen. 2008.PMID: 18473654Free PMC article.