^○Yuki Tanisaka¹, Hirotoshi Iwano¹, Shomei Ryozawa¹, Kumiko Taba¹, Hiroko Sato¹, Kosuke Sudo¹, Shin Arai¹, Yumi Mashimo¹, Masayasu Aikawa², Isamu Koyama², Hiroshi Yamaguchi³ (1.Saitama Medical University International Medical Center, Dept. of Gastroenterology, Saitama, Japan, 2.Saitama Medical University International Medical Center, Gastroenterological Surgery, Saitama, Japan, 3.Saitama Medical University International Medical Center, Department of Pathology, Saitama, Japan)

^○Takashi Ando, Shotaro Maruyama, Tadayuki Sakuragawa (Dept. of Surgery, Tamakyuryou Hospital, Tokyo, Japan)

^○Tetsuya Takikawa, Atsushi Kanno, Atsushi Masamune, Seiji Hongo, Naoki Yoshida, Eriko Nakano, Shin Miura, Shin Hamada, Kiyoshi Kume, Kazuhiro Kikuta, Morihisa Hirota, Toru Shimosegawa (Div. of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan)

^○Nobuaki Kajimoto¹, Satoshi Fukuchi¹, Keisuke Kinoshita¹, Osamu Niizeki¹, Tsutomu Yamashita¹, Toyokichi Muro¹, Kazunari Murakami² (1.Dept. of Gastroenterology,National Hospital Organization Oita Medical Center, Oita, Japan, 2.Department of Gastroenterology,Faculty Of Medicine,Oita University, Oita, Japan)

^○Nobuhiro Aizawa¹, Yoshinori Iwata¹, Chikage Nakano¹, Kunihiro Hasegawa¹, Ryo Takata¹, Tomoko Aoki¹, Kazunori Yo¹, Akio Ishii¹, Kenji Hashimoto¹, Tomoyuki Takashima¹, Yoshiyuki Sakai¹, Naoto Ikeda¹, Hironori Tanaka¹, Hirayuki Enomoto¹, Masaki Saito¹, Hiroko Iijima¹, Seiichi Hirota², Jiro Fujimoto³, Shuhei Nishiguchi¹ (1.Div. of Hepatobiliary and Pancreatic Diseases, Dept. of Internal Medicine, Hyogo College of Medicine, Japan, 2.Department of Surgical Pathology, Hyogo College of Medicine, 3.Division of Hepatobiloary and Pancreatic Surgery, Department of Surgery, Hyogo College of Medicine)