^○Yasunari Kawabata, Hikota Hayashi, Takeshi Nishi, Yoshitsugu Tajima (Department of General and Digestive Surgery)

^○Takehisa Yazawa, Ryota Higuchi, Syuitiro Uemura, Wataru Izumo, Yutaro Matsunaga, Masahiro Shiihara, Yoshihito Kotera, Ariizumi Syunnichi, Hiroto Egawa, Masakazu Yamamoto (Department of Surgery, Institute of Gastoroenterology, Tokyo Women's Medical University, Tokyo, Japan)

^○Naokazu Chiba¹, Shigeto Ochiai¹, Kei Yokotsuka¹, Takahiro Gunji¹, Kosuke Hikita¹, Masaaki Okihara¹, Toru Sano¹, Koichi Tomita¹, Rina Tsutsui¹, Yuta Abe², Motohide Shimazu³, Shigeyuki Kawachi¹ (1.Department of Digestive and Transplantation Surgery, Tokyo Medical University Hachioji Medical Center, 2.Department of Surgery, Keio University School of Medicine, 3.Department of Surgery, Tama Kyuryo Hospital)

^○Shintaro Yagi, Kyoichi Takaori, Kazuyuki Nagai, Takayuki Anazawa, Toshihiko Masui, Hideaki Okajima, Toshimi Kaido, Shinji Uemoto (HBP and transplant Surgery, Kyoto university)

^○Masahiro Ito, Yukio Asano, Masahiro Shimura, Kennshirou Kamio, Toki Kawai, Hironori Yasuoka, Chihiro Hayashi, Akihiko Horiguchi (Department of Surgery, Fujita health University, Nagoya, Japan)

^○Masaharu Ishida, Takanori Morikawa, Tatsuyuki Takadate, Mitsuhiro Shimura, Tatsuo Hata, Kyouhei Ariake, Takeshi Aoki, Koji Fukase, Masamichi Mizuma, Hideo Ohtsuka, Hiroki Hayashi, Kei Nakagawa, Fuyuhiko Motoi, Takeshi Naitoh, Michiaki Unno (Department of Surgery, Tohoku University, Sendai, Japan)