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

^○Takashi Kuise, Yuzo Umeda, Ryuichi Yoshida, Daisuke Nobuoka, Kazuhiro Yoshida, Kazuya Yasui, Daisuke Konishi, Hiroki Okabayashi, Takahito Yagi, Toshiyoshi Fujiwara (Department of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences)

^○Jae Ri Kim (Surgery Seoul National University Hospital)

^○Tomoya Miura, Junichirou Yamauchi, Mamoru Satou (Department of Gastrointestinal Surgery, Sendai Kousei Hospital, Sendai, Japan)

^○Hiroshi Uchinami, Go Watanabe, Yuki Abe, Masato Yoshioka, Yuzo Yamamoto (Department of Gastroenterological Surgery, Akita University, Akita, Japan)

^○Isaku Yoshioka, Kazuto Shibuya, Shinichi Sekine, Katsuhisa Hirano, Tomoyuki Okumura, Tsutomu Fujii (Department of Surgery and Science, University of Toyama)