RecruitingDrug trialPhase 2/3 Trial of Izalontamab Brengitecan vs Platinum-based Chemotherapy for Metastatic Urothelial Cancer With Disease Progression on or After ImmunotherapyA Phase 2/3 Trial of Izalontamab Brengitecan vs Platinum-based Chemotherapy for Metastatic Urothelial Cancer with Disease Progression on or After Immunotherapy