P4HB and bladder transitional cell carcinoma: The PRR score of each BLCA patient was calculated based on the following formula: PRR score= ALDH1A1*0.177833963780602 + DSG1*0.154877476230398 + IFNG*(-0.308143329982385) + IL17A*(-0.60024462463256) + LDLR*0.204175159362262 + NRP2*0.194069051932148 + P4HB*0.376758654397122.