ROR1 and urinary bladder cancer: Considering the importance of ROR1 as a target in cancer and lack of comprehensive studies for cell surface expression of ROR1 in bladder cancer 22, an attempt was made to evaluate the cell surface ROR1 expression in bladder cancer cells using our previously produced anti-ROR1 monoclonal antibody targeting CRD domain 29 and its potential role in apoptosis induction in these cancer cells.