We found that the BLCA cell lines used in this study, UM-UC-3 and T-24 harbor mutations in HR genes such as ATM, ATR, RAD51, FANCD2, PRKDC, TP53, RECQL4, and WRN, which provides a rationale for using these cell lines to model responses of BLCA cells [26]. The gene discussed is ATR; the disease is bladder transitional cell carcinoma.