^○Shuichiro Uemura¹, Ryota Higuchi¹, Shun-ichi Ariizumi¹, Takehisa Yazawa¹, Wataru Izumo¹, Toru Furukawa², Masakazu Yamamoto¹ (1.Department of Surgery, Institute of Gastroenterology, Tokyo Women's Medical University, Tokyo, Japan, 2.Institute for Intergrated Medical Sciences,Tokyo Women`s Medical University,Tokyo,Japan)

^○Kazunori Nakamura, Wataru Shouji, Tomohiro MIzutani, Naoyuki Toyota, Shou Mineta, go Wakabayashi (Department of Surgery,Ageo central general Hospital,Saitama,Japan)

^○Masafumi Yasunaga, Ryuichi Kawahara, Satoki Kojima, Kazuhiro Mikagi, Hisamune Sakai, Hiroto Ishikawa, Toru Hisaka, Yoshito Akagi, Koji Okuda (Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan)

^○Natsuru Sudo¹, Jun Sakata¹, Yoshiaki Tsuchiya², Takashi Aono³, Chie Kitami⁴, Naoyuki Yokoyama⁵, Takuya Ando¹, Kizuki Yuza¹, Daiki Soma¹, Koji Toge¹, Yuki Hirose¹, Tetsuya Nakano¹, Tomohiro Katada¹, Hirosuke Ishikawa¹, Kohei Miura¹, Kazuyashu Takizawa¹, Takashi Kobayashi¹, Toshifumi Wakai¹ (1.Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, 2.Department of Digestive Surgery, Niigata Cancer Center Hospital, 3.Department of Surgery, Niigata Prefectural Central Hospital, 4.Department of Surgery, Nagaoka Chuo General Hospital, 5.Department of Digestive Surgery, Niigata City General Hospital)

^○Daisuke Sato, Yoshinori Suzuki, Yoshitomo Ashitate, Junki Fukuda, Keisuke Yokoyama, Daiki Mori, Toshihiro Kushibiki, Kiyotoshi Hanashiro, Daisuke Saikawa, Yo Kawarada, Shuji Kitashiro, Shunichi Okushiba (Department of Surgery, Tonan Hospital, Sapporo, Japan)

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