NRXN1 and schizophrenia: Current CNV studies of TS and OCD are smaller than those conducted for DD, ASD and schizophrenia, although CNVs have also been shown to increase risk for these disorders [15, 16, 17,29], with deletions of NRXN1 and duplications of CNTN6 currently implicated in TS [17] and 16p13.11 deletions in OCD [15].