In this study, the most strongly associated variant resides within an intron of the Parkin coregulated (PACRG) gene in schizophrenia patients with T2DM vs controls, and another variant that reached genome-wide significance resides within the intron of the TCF7L2 gene (Hackinger et al., 2018). Here, TCF7L2 is linked to type 2 diabetes mellitus.