Tzortzis, V., Dimitropoulos, K., Karatzas, A., Zachos, I., Stamoulis, K., Melekos, M. and Gravas, S. 2015. Feasibility and safety of radical cystectomy under combined spinal and epidural anesthesia in octogenarian patients with ASA score ≥3: A case series. Canadian Urological Association Journal. 9, 7-8 (Jul. 2015), E500–4. DOI:https://doi.org/10.5489/cuaj.2063.