^○Tadafumi Asaoka, Hidetoshi Eguchi, Yoshifumi Iwagami, Daisaku Yamada, Takehiro Noda, Kunihito Gotoh, Shougo Kobayashi, Masaki Mori, Yuichiro Doki (Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University)

^○Yatsuka Sahara, Yuichi Nagakawa, Chie Takishita, Tomoki Shirota, Yousuke Hijikata, Akihiko Tsuchida (Department of Gastrointestinal and Pediatric Surgery, Tokyo Medical University)

^○Masashi Ishikawa, Yoshihiko Tashiro, Kazuo Matsuyama, Takayuki Miyauchi, Taketo Oshio (Department of Surgery, Shikoku Central Hospital, Shikokucentral, Japan)

^○Yuichi Hosokawa^1,2, Yuichi Nagakawa¹, Yatsuka Sahara¹, Chie Takishita¹, Tomoki Shirota¹, Tetsushi Nakajima¹, Yosuke Hijikata¹, Hiroaki Osakabe¹, Nao Kobayashi¹, Akihiko Tsuchida¹ (1.Department of Gastrointestinal and Pdiatric Surgery, Tokyo Medical University, Tokyo, Japan, 2.Nishitokyo central Hospital)

^○Kazuyuki Nagai, Toshihiko Masui, Akitada Yogo, Yuichiro Uchida, Kenzo Nakano, Asahi Sato, Takayuki Anazawa, Kyoichi Takaori, Shinji Uemoto (Department of Hepato-Biliary-Pancreatic Surgery and Transplantation, Kyoto University, Kyoto, Japan)

^○Hirohisa Okabe, Yo-ichi Yamashita, Toshihiko Yusa, Rumi Itoyama, Yosuke Nakao, Yuki Kitano, Shigeki Nakagawa, Katsunori Imai, Hidetoshi Nitta, Akira Chikamoto, Hideo Baba (Department of Gastroenterological Surgery, Kumamoto University, Japan)