^○Masayuki Honda, Dalho Kim (Department of Surgery, Sainokuni Higashi-Omiya Medical Center)

^○Tomoki Hakozaki¹, Koudai Tomioka¹, Yoshihiko Tashiro², Kouji Nogaki¹, Kosuke Yamada¹, Tomokazu Kusano¹, Tomotake Koizumi¹, Takeshi Aoki², Masahiko Murakami¹ (1.Department of Gastroenterological and General Surgery, Showa University, Japan, 2.Department of Gastroenterological and General Surgery,Showa university fujigaoka Hospital,Japan)

^○Fumiaki Tokito¹, Shunichi Ariizumi¹, Yoshihito Kotera¹, Takaaki Kato¹, Akiko Omori¹, Shingo Yamashita¹, Satoshi Nemoto¹, Masakazu Yamamoto¹, Yuki Endo², Chiduo Kikuchi², Hiroshi Niinami² (1.Department of Gastroenterological Surgery, Tokyo Women's Medical University, Tokyo, Japan, 2.Department of Cardiovascular Surgery, Tokyo Women's Medical University, Tokyo, Japan)

^○YoungRok Choi, Ho-Seong Han, Yoo-Seok Yoon, Jai Young Cho, Sungho Kim, Kil Hwan Kim, Hyun In Gun (Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea)

^○Hisashi Imai¹, Kakeru Tawada¹, Satoshi Matsui¹, Nobuhisa Matsuhashi¹, Takao Takahashi¹, Kazuya Yamaguchi¹, Katsutoshi Murase², Natsuko Suzui³, Tatsuhiko Miyazaki³, Kazuhiro Yoshida¹ (1.Department of Surgical Oncology, Gifu University Graduate School of Medicine, Gifu, Japan, 2.Department of General and Cardiothoracic Surgery, Gifu University Graduate School of Medicine, Gifu, Japan, 3.Pathology Division, Gifu University Hospital, Gifu, Japan)