^○Masahiko Kinoshita¹, Akishige Kanazawa¹, Shintaro Kodai¹, Sadatoshi Shimizu¹, Akihiro Murata¹, Kohei Nishio¹, Yorihisa Urata¹, Genya Hamano¹, Yukio Nishiguchi² (1.Department of Hepato-Biliary-Pancreatic Surgery, Osaka City General Hospital, 2.Department of Gastroenterological Surgery, Osaka City General Hospital)

^○Kozo Noguchi, Yoshito Tomimaru, Keizo Dono (Toyonaka Municipal Hospital)

^○Hidetoshi Gon, Masahiro Kiho, Motofumi Tanaka, Hisoka Kinoshita, Shohei Komatsu, Daisuke Tsugawa, Masahide Awazu, Hideyo Mukubo, Sachio Terai, Hirochika Toyama, Kimihiko Ueno, Tetsuo Ajiki, Takumi Fukumoto (Department of Surgery, Division of Hepato-Biliary-Pancreatic Surgery, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan)

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

^○Nikolay Vasilev Belev, Boyko Atanasov, Radoslav Penkov, Shteryu Popov, Panche Krustev, Georgy Dgarov (Surgical Department, UMHAT-Eurohospital)

^○Min Seob Kim, Suk Kyun Hong, Kyung-Suk Suh, Hye Young Woo, Woong Ki Park, Kyung Chul Yoon, Jeong-Moo Lee, Jae-Hyung Cho, Nam-Joon Yi, Kwang-Woong Lee (Department of Surgery, Seoul National University College of Medicine, Seoul, Korea)