^○Tomokazu Kusano, Takahito Hirai, Koudai Tomoika, Hideki Shibata, Yuusuke Wada, Tomoki Hakozaki, Yoshihiko Tashiro, Kouji Nogaki, Kazuhiro Matsuda, Kousuke Yamada, Tomotake Koizumi, Keitarou Miramura, Akira Fujimori, Reiko Koike, Yuuta Enami, Takeshi Aoki, Masahiko Murakami (Department of Gastroenterological & General Surgery, School of Medicine, Showa University, Tokyo, Japan)

^○Hisanori Shiomi, Yasuhisa Tango (Department of Surgery, Nagahama Redcross Hospital)

^○Hisamune Sakai, Toshihiro Sato, Yoriko Nomura, Yusuke Hirakawa, Hiroki Ureshino, Ryuichi Kawahara, Hiroto Ishikawa, Toru Hisaka, Masafumi Yasunaga, Koji Okuda (Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan)

^○Toru Kojima, Takefumi Niguma, Nobuyuki Watanabe, Tetsushige Mimura (Department of Surgery, Okayama Saiseikai General Hospital, Okayama, Japan)

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

^○Motofumi Tanaka¹, Masahiro Kido¹, Hisoka Kinoshita¹, Shohei Komatsu¹, Masahide Awazu¹, Hidetoshi Gon¹, Keisuke Arai¹, Kentaro Tai¹, Yuki Yasuhara¹, Daisuke Tsugawa¹, Hideyo Mukubo¹, Sachio Terai¹, Hirochika Toyama¹, Kimihiko Ueno¹, Tetsuo Ajiki¹, Kazuki Terashima², Yusuke Demizu³, Tomoaki Okimoto², Takumi Fukumoto¹ (1.Department of Surgery, Division of Hepato-Biliary-Pancreatic Surgery, Kobe University, Kobe, Japan, 2.Department of Radiology, Hyogo Ion Beam Medical Center, 3.Department of Radiation Oncology, Hyogo Ion Beam Medical Center Kobe Proton Center)