Affiliation: | (1) Division of Hepato-Biliary-Pancreatic and Transplantation Surgery, Department of Surgery, Graduate School of Medicine, University of Tokyo, Tokyo, Japan;(2) Department of Biostatistics, Graduate School of Medicine, University of Tokyo, Tokyo, Japan;(3) Department of Hepatobiliary-Pancreatic Surgery, Juntendo School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan; |