^○Shigeyuki Kawachi¹, Naokazu Chiba¹, Rina Tutui¹, Kouichi Tomita¹, Toru Sano¹, Masaaki Okihara¹, Takaaki Gunji¹, Kei Yokoduka¹, Narihito Ochiai¹, Motohide Shimazu² (1.Dep. of Digestive and Transplantation Surgery, Tokyo Medical University Hachioji Medical Center, 2.Dep. of Srugery, Tama Kyuryo Hospital)

^○Ikuo Nakamura, Etsuro Hatano, Seikan Miyashita, Masaharu Tada, Kazuhiro Suzumura, Naoki Uyama, Yasukane Asano, Toshihiro Okada, Junichi Yamanaka, Jiro Fujimoto (Department of Hepatobiliarypancreatic Surgery, Hyogo College of Japan)

^○Hiroshi Sadamori, Masayoshi Hioki, Kazuteru Monden, Masashi Yoshimoto, Chiaki Kobatake, Norihisa Takakura (Department of Surgery, Fukuyama City Hospital, Fukuyama, Japan)

^○Manabu Kawai, Seiko Hirono, Ken-ichi Okada, Motoki Miyazawa, Yuji Kitahata, Ryohei Kobayashi, Masaki Ueno, Shinnya Hayami, Norihiko Suzaki, Hiroki Yamaue (Second Department of Surgery, Wakayama Medical University)

^○Yasuji Seyama¹, Kazuhiro Mori¹, Hiroyuki Kanomata¹, Hiromichi Takahashi², Yujiro Matsuoka² (1.Department of Surgery, Tokyo Metropolitan Bokutoh Hospital, 2.Department of radiology, Tokyo Metropolitan Bokutoh Hospital)