DLG4 and schizophrenia: In haplotype-based association analysis, we found a significant association of the haplotype C–D derived from the two polymorphic markers located at the core promoter (rs2230178 and rs6145976, p = 0.01) with schizophrenia, whereas a nominal association of the haplotype C-D-C derived from 3 markers (rs2230178, rs6145976, and rs2017365,p = 0.03), and the haplotype C-D-C-C derived from the four polymorphic markers at the 5′ end of the DLG4 gene (rs2230178, rs6145976, rs2017365, and rs739669, p = 0.04) with schizophrenia.