^○Kojiro Taura¹, Gen Yamamoto¹, Iwao Ikai², Yoshinobu Ikeno¹, Kenji Yoshino¹, Yusuke Uemoto¹, Ken Fukumitsu¹, Takamichi Ishii¹, Satoru Seo¹, Hideaki Okajima¹, Toshimi Kaido¹, Etsuro Hatano³, Shinji Uemoto¹ (1.Department of Surgery, Kyoto University, Kyoto, Japan, 2.Department of Surgery, National Hospital Organization Kyoto Medical Center, Kyoto, Japan, 3.Department of Surgery, Hyogo College of Medicine)

^○Masamichi Hayashi, Suguru Yamada, Hideki Takami, Masaya Suenaga, Yukiko Niwa, Tomonari Asano, Daishi Morimoto, Haruyoshi Tanaka, Mitsuru Tashiro, Nobutake Tanaka, Katsuhito Tanaka, Yoshiyasu Katoh, Yasuhiro Kodera (Department of Gastroenterological Surgery , Nagoya University Graduate School of Medicine)

^○Naruhiko Honmyo, Tsuyoshi Kobayashi, Shintaro Kuroda, Kentaro Ide, Masahiro Ohira, Hiroyuki Tahara, Seiichi Shimizu, Michinori Hamaoka, Sho Okimoto, Megumi Yamaguchi, Hiroaki Mashima, Hideki Ohdan (Department of gastroenterological and transplant Surgery, Hiroshima University, Hiroshima, Japan)

^○Haruki Mori, Hiroya Iida, Hiromitsu Maehira, Naomi Kitamura, Tomoharu Shimizu, Toru Miyake, Nobuhito Nitta, Masaji Tani (Department of Surgery, Shiga University of Medical Science, Shiga, Japan)

^○Yuta Kobayashi, Junichi Shindoh, Masaji Hashimoto (Department of Digestive Surgery, Toranomon Hospital, Tokyo, Japan)