Among 146 genes, there were seven genes common to four disorders, including GLT8D1, KCNB1, GABBR1, HIST1H1B, HIST1H2BN, and HIST1H4L in SCZ, DEP, BD, and ASD, and DCC in ADHD, ASD, DEP, and SCZ. The gene discussed is KCNB1; the disease is attention deficit-hyperactivity disorder.