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Pinkham AE, Penn DL, Perkins DO, Graham KA, Siegel M.Pinkham AE, et al. Among authors: perkins do.Cogn Neuropsychiatry. 2007 May;12(3):198-212. doi: 10.1080/13546800600985557.Cogn Neuropsychiatry. 2007.PMID: 17453901