GSTM1 and schizophrenia: In the patients with schizophrenia, the [oxy-Hb] increases in the Met carriers were significantly greater than those in the Val/Val individuals at two channels that corresponded approximately to the frontopolar PFC regions (ch38 (p = 0.00114; d = 1.07; 95%CI 0.40, 1.70; Met carriers: N = 23, Val/Val individuals: N = 19) and ch48 (p = 0.00094; d = 1.08; 95%IC 0.39, 1.72; Met carriers: N = 22, Val/Val individuals: N = 18); FDR-corrected p: 0.0001–0.0019) (Figure 2).