Is R1 vascular hepatectomy for hepatocellular carcinoma oncologically adequate? analysis of 327 consecutive patients. (September 2018) - Donadon, M.; Terrone, A.; Darwish, S.; Procopio, F.; Cimino, M.; Palmisano, A.; Viganò, L.; Del Fabbro, D.; Torzilli, G.