MMP7 and posterior cortical atrophy: The polymorphisms from MMP1-1607 2G/1G, MMP2-735 T/C and MMP7-181 G/A had no correlations with PCa risk, such as (T-allele vs. C-allele, OR = 0.801, 95% CI = 0.614–1.045, Pheterogeneity = 0.010, P = 0.103), (TC vs. CC, OR = 0.999, 95% CI = 0.755–1.323, Pheterogeneity = 0.366, P = 0.997), (GA vs. AA, OR = 0.977, 95% CI = 0.725 -1.314, Pheterogeneity = 0.177, P = 0.875).