Nevertheless, there are other PLA2 genes that were found to be associated with the risk of schizophrenia, e.g., PLA2G4C29,30,33, or the niacin-induced flush response in schizophrenia patients, e.g., PLA2G4A and PTGS2 (ref. 35). The gene discussed is PTGS2; the disease is schizophrenia.