^○Yasunori Nishida¹, Masaru Konishi², Kenju Kou¹, Motokazu Sugimoto¹, Shinichiro Takahashi², Naoto Gotohda² (1.Department of Surgery, Aizawa Hospital, Matsumoto, Nagano, Japan, 2.Department of Hepatobiliary-Pancreatic Surgery, National Cancer Center Hospital East, Kashiwa, Japan)

^○Taichi Kuwahara¹, Yoshihiro Tokuhisa¹, Yukio Tokumitsu¹, Kensuke Yamada¹, Yasuhiro Fujiwara¹, Masao Nakajima¹, Takuya Fujimoto¹, Satoshi Matsukuma¹, Hiroto Matsui¹, Shinsuke Kanekiyo¹, Shinobu Tomochika¹, Michihisa Iida¹, Kazuhiko Sakamoto¹, Nobuaki Suzuki¹, Shigeru Takeda¹, Shigefumi Yoshino², Shoichi Hazama³, Tomio Ueno⁴, Hiroaki Nagano¹ (1.Department of Gastroenterological, Breast and Endocrine Surgery, Yamaguchi University Graduate School of Medicine, 2.Oncology Center, Yamaguchi University Hospital, 3.Department of Translational Research and Developmental Therapeutics against Cancer, Yamaguchi University School of Medicine, 4.Department of Digestive Surgery, Kawasaki Medical School)

^○Mihoko Yamada, Teiich Sugiura, Yukiyasu Okamura, Takaaki Ito, Yusuke Yamamoto, Ryo Ashida, Katsuhisa Ohgi, Nobuyuki Watanabe, Takuya Minagawa, Katsuhiko Uesaka (Division of Hepato-Biliary-Pancreatic Surgery, Shizuoka Cancer Center, Shizuoka, Japan)

^○Makoto Muto¹, Seiko Suzushino¹, Junichiro Watanabe¹, Naoya Sato¹, Yasuhide Kofunato¹, Teruhide Ishigame¹, Ryo Okada¹, Takashi Kimura¹, Akira Kenjo¹, Tatsuo Shimura¹, Koji Kono², Shigeru Marubashi¹ (1.Department of Hepato-Biliary-Pancreatic and Transplant Surgery, Fukushima Medical University, Fukushima, Japan, 2.Department of Gastrointestinal Tract Surgery, Fukushima Medical University, Fukushima, Japan)

^○Yasushi Hashimoto, Takuya Sakoda, Tetsuhiro Hara, Hirofumi Doi (Digestive Disease Center, Hiroshima Memorial Hospital)

^○Tetsuya Nakano, Kazuyasu Takizawa, Takuya Ando, Kizuki Yuza, Daiki Soma, Koji Toge, Yuki Hirose, Tomohiro Katada, Hirosuke Ishikawa, Kohei Miura, Jun Sakata, Takashi Kobayashi, Toshifumi Wakai (Division of Digestive and General Surgery, Niigata University)