PCAT7 and urinary bladder cancer: Five commonly used CRLs were selected for experimental verification by qRT-PCR, including PCAT7, LINC01184 (SLC12A2-DT), MPP7-DT, FAM87B and UBE2Q1-AS1 in human bladder cancer tissues and normal bladder tissues (Normal bladder tissues are assigned to the low-risk group).