OLIG2 and schizophrenia: The investigation on the relationship between rs1059004 polymorphism which locates in the 3′-untranslated region (3′UTR) intronic region of the OLIG2 gene and the whole-brain FC in patients with first-episode schizophrenia reveals that the FC strength decreased both in patients with schizophrenia and healthy controls with risk A allele and there is at some level a positive relationship between FC strength and verbal fluency score in patients, suggesting that there are synergistic effects between rs1059004 polymorphism and brain connections (Cai et al., 2020a).