^○Makoto Sukegawa¹, Satoshi Mizutani¹, Hideyuki Suzuki¹, Seiji Yamagishi¹, Rina Oyama¹, Ryou Nakata¹, Masanori Watanabe¹, Eiji Uchida² (1.Institute of Gastroenterology, Nippon Medical School Musashikosugi Hospital, Kawasaki, Japan, 2.Department of Surgery, Nippon Medical School, Tokyo, Japan.)

^○Daisuke Kuga, Kiyoshi Hiramatsu, Takashi Seki, Haruhisa Kawanami, Yumi Suzuki, Toshiyuki Arai (Department of Surgery, Anjo Kosei Hospital)

^○Hisateru Komatsu, Masaki Kashiwazaki, Yujiro Nishizawa, Rie Nakatsuka, Susumu Miyazaki, Takamichi Komori, Masaaki Motoori, Kazuhiro Iwase, Kazumasa Fujitani (Department of Gastroenterological Surgery, Osaka General Medical Center, Osaka, Japan)

^○Masahiko Fujii, Kazunori Ueda, Shohei Okikawa, Masayoshi Obatake, Shinichiro Yamada, riki Ohno, Mami Kanamoto, Hiromi Ohtani, Masamitsu Harada, Hideki Kawasaki (Department of Gastroenterological Surgery, Ehime Prefectural Central Hospita)

^○Yukihiko Tokunaga, Hirokazu Sasaki (Department of Surgery, Japan Post Kyoto Teishin Hospital)

^○Atsushi Kohga, Kenji Suzuki, Takuya Okumura (Department of Surgery, Fujinomiya General City Hospital)