Statistically significant GWAS signals have been detected in three smaller studies for the ZEB2 gene: in a 2013 PGC GWAS study predating the dataset analysed here [52], in a Han Chinese population GWAS from 2016 [53] and recently in the GWAS meta-analysis including 40,675 schizophrenia patients that included all the PGC patients, and additional 11,260 cases from the CLOZUK sample [8]. This evidence concerns the gene ZEB2 and schizophrenia.