1. Third Department of Surgery, University of Milan, Faculty of Medicine, Istituto Clinico Humanitas-Istituto di Ricerca e Cura a Carattere Scientifico (IRCCS), Rozzano, Milan, Italy
2. Hepato-Biliary-Pancreatic Surgery Division, Artificial Organ and Transplantation Division, Department of Surgery, Graduate School of Medicine, University of Tokyo, Tokyo, Japan