DPP4 and posterior cortical atrophy: As shown in Table 2, the highest distribution frequencies of the DPP4 rs7608798, rs3788979, rs2268889 and rs6741949 SNPs in PCa patients were heterozygous A/G and C/T for the rs7608798 and rs3788979 loci, respectively, and homozygous T/T and G/G for the rs2268889 and rs6741949 loci, respectively.