^○Makoto Hashizume (Centeｒ for Advanced Medical Innovation, Kyushu University)

^○Takeaki Ishizawa^1,2, Akio Saiura^1,2, Kiyoshi Hasegawa¹ (1.Hepato-Biliary-Pancreatic Surgery Division, Department of Surgery, Graduate School of Medicine, the University of Tokyo, 2.Department of Gastroenterological Surgery, Cancer Institute Hospital, Japanese Foundation for Cancer Research)

^○Etsuro Hatano (Department of Surgery, Hyogo College of Medicine)

^○Takeshi Aoki, Masahiko Murakami (Department of Gastroenterological & General Surgery, Showa University, Tokyo, Japan)

^○Yukio Oshiro (Department of Surgery, Division of Gastroenterological and Hepatobiliary Surgery, and Organ Transplantation, Faculty of Medicine, University of Tsukuba)