^○Kazuhiko Kitaguchi, Eiji Toyoda, Yusuke Abe, Akihiro Kaneda, Jun Matsubayashi, Yusuke Nakayama, Katsuaki Ura, Hideaki Oe, Tetsuro Hirose, Ryuichiro Doi (Department of Surgery, Otsu Red Cross Hospital, Otsu, Japan)

^○Akira Matsushita, Yoshiharu Nakamura, Kazuya Yamahatsu, Hiroki Sumiyoshi, Hiroyasu Furuki, Tomohiro Kanda, Tetsuya Shimizu, Yoichi Kawano, Masato Yoshioka, Tadashi Yokoyama, Nobuhiko Taniai, Yasuhiro Mamada, Eiji Uchida (Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, Tokyo, Japan)

^○Youngju Ryu, In Woong Han, Dong Wook Choi, Seong Ho Choi, Jin Seok Heo, Yung hun You, Sunjong Han, Dae Joon Park (Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea)

^○Toru Aoyama^1,2, Mariko Kamiya^1,2, Naoto Yamamoto^1,2, Masaaki Murakawa¹, Takashi Oshima¹, Norio Yukawa¹, Yasushi Rino¹, Munetaka Masuda¹, Soichiro Morinaga² (1.Department of Surgery, Yokohama City University, 2.Department of Gastrointestinal Surgery, Kanagawa Cancer Center)

^○Nobuhito Nitta, Hiromitsu Maehira, Hiroya Iida, Naomi Kitamura, Haruki Mori, Toru Miyake, Tomoharu Shimizu, Masaji Tani (Division of Gastrointestinal, Brest and General Surgery, Shiga University of Medical Science, Otsu, Japan)

^○Masaki Morimoto, Teruhisa Sakamoto, Masataka Amisaki, Yosuke Arai, Naruo Tokuyasu, Soichiro Honjo (Department of Surgery, Division of Surgical Oncology, Faculty of Medicine, Tottori University)