TP53 and bladder transitional cell carcinoma: We aimed to validate our predicted prognostic miRNAs of the p53-like bladder cancer subtype in multiple independent data sets with mRNA expression profiles: Riester et al. [25] including 73 MIBC samples, Lindgren et al. [26] including 131 BLCA samples, and Choi et al. [1] with discovery and validation cohorts including 73 MIBC samples for each cohort.