^○Yusuke Wada, Takeshi Aoki, Koichiro Fujimasa, Takahito Hirai, Kodai Tomioka, Hideki Shibata, Tomoki Hakozaki, Yoshihiko Tashiro, Koji Nogaki, Kazuhiro Matsuda, Kosuke Yamada, Tomokazu Kusano, Tomotake Koizumi, Akira Fujimori, Yuta Enami, Masahiko Murakami (Department of Gastroenterological Surgery and General Surgery, Showa University, Tokyo, Japan)

^○Masaru Inagaki, Koji Kiada, Naoyuki Tokunaga, Takuya Kato, Yosuke Tsunemitsu, Hiromi Iwagaki (Department of Surgery, National Hospital Organization Fukuyama Medical Center)

^○Naoya Sato, Ryo Okada, Teruhide Ishigame, Yasuhide Kofunato, Junichiro Watanabe, Makoto Muto, Seiko Suzushino, Takashi Kimura, Akira Kenjo, Tatsuo Shimura, Shigeru Marubashi (Department of Hepato-Biliary=pancreatic and Transplant Surgery, Fukushima, Japan)

^○Toshiya Ochiai¹, Hiroyuki Inoue¹, Kyoichi Harada¹, Hiroshi Ito¹, Atsushi Toma¹, Rei Morimura², Hisashi Ikoma², Eigo Otsuji² (1.Department of Surgery, North Medical Center, Kyoto Prefectural University of Medicine, Kyoto, Japan, 2.Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine)

^○Yusuke Kyoden, Noriyuki Ooba, Hideyuki Kanemoto, Akihiko Takagi, Takeo Toda, Masakazu Takagi (Shizuoka General Hospital Gastroenterological Surgery Division)

^○Nanako Yasui, Takeshi Koujima, Tsuyoshi Kawai, Yoshikatsu Endo, Takanori Watanabe, Kyohei Kai, Shizo Sato (Japanese Red Cross Hospital Society Himeji Hospital)