VRK2 and attention deficit-hyperactivity disorder: Among these 23 loci, ten (PAX5, RERE, VRK2, MEF2C, L3MBTL2, DCC, SORCS3, NEGR1, VRK2, LIN28B) were shared with other neuropsychiatric disorders (SCZ, BD, ASD, ADHD) reported in the GWAS catalog [20].