Yasuni Nakanuma¹, Yuko Kakuda¹ (1.Fukuisaiseikai Hospital Department of Diagnostic Pathology, 2.Shizuoka Prefectural Shizuoka Cancer Center Department of Diagnostic Pathology)

Kee-Taek Jang^1,2 (1.Department of Pathology and Translational Genomics, 2.Samsung Medical Center, Sungkyunkwan University School of Medicine)

Noriyoshi Fukushima (Department of Pathology, Jichi Medical University)

Hiroyuki Kato, Masanobu Usui, Aoi Hayasaki, Yusuke Iizawa, Takehiro Fujii, Akihiro Tanemura, Yasuhiro Murata, Yoshinori Azumi, Nohisa Kuriyama, Masashi Kishiwada, Shugo Mizuno, Hiroyuki Sakurai, Shuji Isaji (Department of Hepatobiliary Pancreatic and Transplant Surgery, Mie University Graduate School of Medicine)

Satoru Tsuruta, Norihisa Kimura, Keinosuke Ishido, Daisuke Kudo, Kenichi Hakamada (Department of Gastroenterological Surgery, Hirosaki University Graduate School of Medicine)

Takeomi Hamada, Atsushi Nanashima, Naoya Imamura, Koichi Yano, Masahide Hiyoshi (Division of Hepato-biliary-pancreas Surgery, Department of Surgery, University of Miyazaki Faculty of Medicine)

Yusuke Uemoto, Kojiro Taura, Gen Yamamoto, Kenji Yoshino, Satoshi Ogiso, Ken Fukumitsu, Takamichi Ishii, Satoru Seo, Hideaki Okajima, Toshimi Kaido, Shinji Uemoto (Kyoto University, Department of Surgery, Division of Hepato-Biliary-Pancreatic surgery and Transplantation)

Shunsuke Onoe, Tomoki Ebata, Yukihiro Yokoyama, Tsuyoshi Igami, Takashi Mizuno, Junpei Yamaguchi, Nobuyuki Watanabe, Masato Nagino (Division of Surgical Oncology, Nagoya University Graduate School of Medicine)