In the female schizophrenia patients (Fig. 4D), only the TBIL level of UGT1A1*6 (ANOVA: F(3,108) = 4.625, p = 0.004; UGT1A1*6 vs. wild type: p = 0.004; UGT1A1*6 vs. SLCO1B1*15: p = 0.032) was significantly higher than the wild type and SLCO1B1*15. Here, UGT1A1 is linked to schizophrenia.