NLGN4X and 22q11.2 deletion syndrome: Well-known examples include fragile × syndrome [36], Rett syndrome [37] and mutations in the neuroligin genes NLGN3 and NLGN4 [38], all of which are associated with autistic spectrum disorder, and velocardiofacial syndrome (22q11.2 deletion syndrome) [39] and the Scottish DISC1 translocation [40], which are associated with schizophrenia and other psychiatric diagnoses.