HSPG2 and bladder transitional cell carcinoma: To assess the ability of the 6-RBP-based model predicting survival of BLCA, we created a risk score according to the expression of six RBPs as follows: Risk score = (3.50 ∗ expression value of HSPG2) + (1.74 ∗ expression value of AHNAK) + (0.35 ∗ expression value of PCSK9) - (1.49 ∗ expression value of FLNA) - (1.45 ∗ expression value of FASTKD3) - (0.28 ∗ expression value of POU5F1).