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Schuepbach, D; Hill, S K; Sanders, R D; Hell, D; Keshavan, M S; Sweeney, J A (2004). Early treatment-induced improvement of negative symptoms predicts cognitive functioning in treatment-naive first episode schizophrenia: a 2-year followup. Schizophrenia Bulletin, 30(4):837-848.
Sanders, R D; Schuepbach, D; Goldstein, G; Haas, G L; Sweeney, J A; Keshavan, M S (2004). Relationships between cognitive and neurological performance in neuroleptic-naïve psychosis. Journal of Neuropsychiatry and Clinical Neurosciences, 16(4):480-487.