PI4K2B and schizophrenia: Another GWAS study has associated a PI4K2B SNP with cannabis dependence (Sherva et al., 2016), which in turn is associated with increased risk of schizophrenia (Vaucher et al., 2017), while PI4K2B has also been identified as a candidate gene in schizophrenia on a study on Scottish population cohort (Houlihan et al., 2009).