Cystectomy/adverse effects/*methods Disease-Free Survival Follow-Up Studies Humans Incidence Intraoperative Complications/*epidemiology/etiology Length of Stay/statistics & numerical data Neoplasm Recurrence Local/*epidemiology/etiology/prevention & control Randomized Controlled Trials as Topic Urinary Bladder/*injuries/pathology/surgery Urinary Bladder Neoplasms/mortality/pathology/*surgery Bipolar bladder tumors meta-analysis monopolar transurethral resection