^○Akira Nakashima, Toshihiko Kohashi, Koichi Oishi (Department of Surgery, Hiroshima City Asa Citizens Hospital)

^○Mariko Ogino^1,2, Yoshitsugu Nakanishi¹, Tomoko Mitsuhashi², Yutaka Hatanaka², Kimitaka Tanaka¹, Toshimichi Asano¹, Takehiro Noji¹, Yo Kurashima¹, Yuma Ebihara¹, Soichi Murakami¹, Toru Nakamura¹, Takahiro Tsuchikawa¹, Keisuke Okamura¹, Toshiaki Shichinohe¹, Satoshi Hirano¹ (1.Department of Gastroenterological Surgery II, Faculty of Medicine, Hokkaido University, Sapporo, Japan, 2.Department of Surgical Pathology, Hokkaido University Hospital, Sapporo, Japan)

^○Yurika Iida, Akihiro Murata, Sadatoshi Shimizu, Shintaro Kodai, Kohei Nishio, Yorihisa Urata, Kotaro Miura, Masahiko Kinoshita, Genya Hamano, Tetsuzo Tashima, Sota Deguchi, Syuhei Kushiyama, Daisuke Shirai, Akishige Kanazawa (Department of Hepato-Biliary-Pancreatic Surgery, Osaka City General Hospital. Osaka, Japan)

^○Koh Ye Xin¹, Chua D¹, Low A², Goh BKP^1,3, Cheow PC^1,3, Kam JH^1,3,4, Teo JY^1,3, Tan EK¹, Chung AYF^1,3, Ooi LL^1,3, Chan CY^1,3, Lee SY^1,3 (1.Department of Hepatopancreatobiliary and Transplant Surgery, Singapore General Hospital, 2.Department of Diagnostic Radiology, Singapore General Hospital, 3.Duke-National University of Singapore (NUS) Medical School, 4.Department of General Surgery, Sengkang General Hospital)

^○Nobuhiro Tsuchiya, Ryusei Matsuyama, Takashi Murakami, Yasuhiro Yabushita, Yu Sawada, Ryutaro Mori, Takafumi Kumamoto, Itaru Endo (Department of Gastroenterological Surgery, Yokohama City University School of Medicine, Yokohama, Japan)