CCL18 and posterior cortical atrophy: The statistical analysis showed that CCL18 mRNA expression level was significantly upregulated in PCa tissues compared with those in noncancerous prostate tissues (P < 0.01, Figure 1(a)), which was consistent with the findings of western blot analysis on CCL18 protein expression (PCa: 1.06 ± 0.23 versus benign: 0.32 ± 0.24, P < 0.01, Figures 1(b) and 1(c)).