Impact of the learning-curve with parenchyma sparing hepatectomy for deep tumors: time vs complexity?. (September 2018) - Vacca, P.G.; Roffi, N.; Gianfaldoni, C.; Balestri, R.; Puccini, M.; Rossi, E.; Licitra, G.; Colombatto, P.; Buccianti, P.; Urbani, L.