^○Xiao-Ping Chen (Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, China)

^○Takahisa Fujikawa, Norio Emoto, Yusuke Kawamoto, Akira Tanaka (Department of Surgery, Kokura Memorial Hospital)

^○Ryo Ashida, Teiichi Sugiura, Yukiyasu Okamura, Takaaki Ito, Yusuke Yamamoto, Katsuhisa Ohgi, Mihoko Yamada, Nobuyuki Watanabe, Takuya Minagawa, Shusei Sano, Shunsuke Tamura, Takashi Miyamoto, Katsuhiko Uesaka (Division of Hepato-Biliary-Pancreatic Surgery, Shizuoka Cancer Center, Shizuoka, Japan)

^○Masataka Amisaki, Ei Uchinaka, Masaki Morimoto, Naruo Tokuyasu, Teruhisa Sakamoto, Soichiro Honjo (Department of Surgery, Division of Surgical Oncology, Tottori University School of Medicine, Tottori, Japan)

^○Shunichi Ariizumi, Kotera Kotera, Shingo Yamashita, Akiko Omori, Takaaki Kato, Satoshi Nemoto, Ryota Higuchi, Takehisa Yazawa, Shuichirou Uemura, Wataru Izumo, Satoshi Katagiri, Hiroto Egawa, Masakazu Yamamoto (Department of Surgery, Institute of Gastroenterology, Tokyo Women's Medical Univ.)

^○Masahiro Ohira, Yuki Imaoka, Ryosuke Nakano, Seiichi Shimizu, Shintaro] Kuroda, Hiroyuki Tahara, Tsuyoshi Kobayashi, Hideki Ohdan (Department of Gastroenterological and Transplant Surgery, Hiroshima University, Hiroshima, Japan)

^○Yuji Kitahata, Manabu Kawai, Seiko Hirono, Ken-ichi Okada, Motoki Miyazawa, Masaki Ueno, Shinya Hayami, Ryohei Kobayashi, Norihiko Suzaki, Hiroki Yamaue (2nd Department of Surgery, Wakayama Medical University, Wakayama, Japan)

^○Takahiro Akahori, Minako Nagai, Satoshi Nishiwada, Kenji Nakagawa, kota Nakamura, Takeo Nomi, Daisuke Hokuto, Takahiro Yoshikawa, Yasuko Matsuo, Naoya Ikeda, Masayuki Sho (Department of Surgery, Nara Medical University, Nara, Japan)

^○Hiroshi Noda, Nao Kakizawa, Takaharu Kato, Fumiaki Watanabe, Yuhei Endo, Naoya Kasahara, Toshiki Rikiyama (Department of Surgery, Saitama Medical Center, Jichi Medical University)