GRM7 and schizophrenia: Since the completion of our study, two genome-wide association studies have reported additional SNPs as risk factors for schizophrenia: the rs1006737 SNP of the CACNA1C gene (MIM 114205) in the European population [55], the rs548181 SNP of the STT3A gene (MIM 601134), the rs17603876 SNP of the NRG1 gene (MIM 142445), and the rs3864075 SNP of the GRM7 gene (MIM 604101) in individuals of Indo-European and Dravidian ancestry [56].