Systematic meta-analysis on the psychotic diseases including schizophrenia, BAD, and ADHD identified several gene variants in ZNF804A, the zinc finger DHHC-type-containing 8 (ZDHHC8) and the zinc finger with KRAB and SCAN domain 4 (ZKSCAN4) genes (67). Here, ZKSCAN4 is linked to schizophrenia.