Blood Loss Surgical/statistics & numerical data Blood Transfusion/statistics & numerical data Cystectomy/*adverse effects/methods Hospital Mortality Humans Length of Stay/statistics & numerical data Operative Time Postoperative Complications/*epidemiology/etiology Quality of Life Risk Factors Robotic Surgical Procedures/*adverse effects Treatment Outcome Urinary Bladder/surgery Urinary Bladder Neoplasms/*surgery Urinary Diversion/*adverse effects/methods health-related quality of life meta-analysis open radical cystectomy postoperative complication robot-assisted radical cystectomy