VRK2 and schizophrenia: VRK2, encoded by the Vrk2 gene, has been repeatedly associated with schizophrenia and related NDDs in genome‐wide association studies (GWAS) (Consortium et al. 2012; Lee et al. 2019; Li, Wang, et al. 2012; Steinberg et al. 2011; Zhang et al. 2015).