BCR and posterior cortical atrophy: To determine the vital circRNAs for PCa prognosis, which fulfill the following criteria, FC > 1.3 in GSE155792 and related to BCR in GSE113120 (fragments per kilobase million > 0.5, p-value < 0.005 and hazard ratio > 1 in Cox regressions) (Supplementary Table S2).