^○Terrence Chi Hong Hui, Low Hsien Min, Tan Cher Heng (Diagnostic Radiology Tan Tock Seng Hospital, Singapore)

^○Yasushi Shibasaki, Takanori Sakaguchi, Ryo Kitajima, Satoru Furuhashi, Ryota Kiuchi, Makoto Takeda, Takanori Hiraide, Yoshifumi Morita, Hirotoshi Kikuchi, Hiroya Takeuchi (Second Department of Surgery, Hamamatsu University School of Medicine)

^○Tadaomi Fukada, Hisashi Kametaka, Hironobu Makino, Takahiro Akiyama, Manabu Saito, Shunsuke Tabe, Kazuhiro Seike (Department of General Surgery, Odawara Municipal Hospital, Kanagawa, Japan)

^○Takashi Maeda, Daisuke Imai, Kensaku Sanefuji (Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, Hiroshima Red Cross Hospital & Atomic-bomb Survivors Hospital)

^○Kenji Koneri¹, Takayuki Naruse¹, Takuma Nishino¹, Hidetaka Kurebayashi¹, Daisuke Fujimoto¹, Mitsuhiro Morikawa¹, Makoto Murakami¹, Yasuo Hirono¹, Kanji Katayama², Takanori Goi¹ (1.1st Department of Surgery, University of Fukui, Fukui, Japan, 2.Cancer care promotion center, University of Fukui, Fukui, Japan)

^○Yusuke Mitsuka¹, Shintaro Yamazaki¹, Tokio Higaki¹, Tadatoshi Takayama¹, Masahiko Sugitani² (1.Department of Digestive Surgery, Nihon University School of Medicine, 2.Department of Pathology, Nihon University school of Medicine,)