Antineoplastic Combined Chemotherapy Protocols/*therapeutic use Carcinoma Transitional Cell/immunology/mortality/pathology/*therapy Chemotherapy Adjuvant/methods/statistics & numerical data Clinical Trials Phase I as Topic Clinical Trials Phase II as Topic Cystectomy Disease-Free Survival Follow-Up Studies Humans Immune Checkpoint Inhibitors/*therapeutic use Muscle Smooth/pathology/surgery Neoadjuvant Therapy/*methods/statistics & numerical data Neoplasm Invasiveness/pathology Prospective Studies Treatment Outcome Urinary Bladder/pathology/surgery Urinary Bladder Neoplasms/immunology/mortality/pathology/*therapy Bladder cancer Immune checkpoint inhibitors Immunotherapy Neoadjuvant