Outcomes of radical cystectomy in pT4 bladder cancer frail patients: A high-volume single center study. - Stamatakos, Panagiotis Velissarios; Moschotzopoulos, Dimitrios; Glykas, Ioannis; Fragkoulis, Charalampos; Kostakopoulos, Nikolaos; Papadopoulos, Georgios; Stathouros, Georgios; Aristas, Odysseas; Dellis, Athanasios; Papatsoris, Athanasios; Ntoumas, Konstantinos (Journal of Frailty, Sarcopenia & Falls, 2022)