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Differences in the executive functions among patients with schizophrenia, their unaffected first-degree relatives, and healthy controls. Abbreviations: %PEN; percentage of perseverative errors of Nelson types; CA; categories achieved; TE; total errors. Age- and gender-corrected scores of executive functions were indicated. Error bars indicate the standard error of the mean scores.*Post hoc P < .05, **post hoc P < .01, ***post hoc P < .001.
