PPP3CC and schizophrenia: Since the significant interaction of gender and DAO and PPP3CC genes, an epistatic effect was performed and a 66% lower risk of developing schizophrenia was observed among females with the PPP3CC CAG triplotype and the DAO GT diplotype carriers as compared with non-CAG or -GT haplotype carriers of the same sex, whereas the CAG triplotype and the GT diplotype alone showed a 47% and a 42% lower risk for schizophrenia, respectively.