DNMT1 mRNA-positive neuronal counts in various layers of BA9 from nonpsychiatric subjects and psychiatric patients. For NPS, n = 26; for SZP, n = 19; for BP+ patients, n = 14; for BP- patients, n = 5. The difference between SZP and BP patients with or without psychosis versus NPS was calculated by ANOVA, and P values were evaluated by Dunnett's two-sided test comparison. ***, P < 0.001; **, P < 0.01; *, P < 0.05. Error bars represent SEM.