^○Yasutaka Kuribayashi¹, Shu Hoteya¹, Syusuke Haruta² (1.Dept. of Gatroenterology Toranomon Hospital, Tokyo, Japan, 2.Dept. of Gatroenterological Surgery Toranomon Hospital, Tokyo, Japan)

^○Toshiaki Hirasawa¹, Naoki Hiki², Yorimasa Yamamoto¹ (1.Dept. of Gastroenterology, Cancer Institute Hospital, Tokyo, Japan, 2.Department of Surgery, Cancer institute hospital, Tokyo, Japan)

^○Hirohito Mori^1,2, Hideki Kobara¹, Tsutomu Masaki¹ (1.Dept. of Gastroenterology and Neurology, Kagawa University, Japan, 2.Department of Gastroenterological Surgery, Ehime Rosai Hospital, Ehime, Japan)

^○Keiko Niimi^1,2, Susumu Aikou³, Kazuhiko Koike² (1.Center For Epidemiology and Preventive Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan, 2.Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan, 3.Department of Gastrointestinal Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan)

^○Takao Ichihara, Masaki Taki (Amagasaki Central Hospital, Japan)

^○Osamu Goto¹, Hiroya Takeuchi², Naohisa Yahagi¹ (1.Div. Research and Development For Minimally Invasive Treatment, Cancer Center, Keio University, School of Medicine, Tokyo, Japan, 2.Dept. of Surgery, Keio University, School of Medicine, Tokyo, Japan)

^○Hidekazu Kitakata¹, Tohru Itoh¹, Shin-ichi Kinami² (1.Dep. of Gastroenterological Endoscopy, Kanazawa Medical Univ., Ishikawa, Japan, 2.Dep. of General and Digestive Surgery, Kanazawa Medical Univ., Ishikawa, Japan)

^○Makoto Oryu¹, Hideki Kobara², Hirohito Mori² (1.Dept. of Gastroenterology, Kagawa Saiseikai Hopsital, Kagawa, Japan, 2.Dept. of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kagawa, Japan)

^○Chihiro Yasue¹, Hiroki Tsujimoto³, Shigeaki Nagao² (1.Dept. of Internal Medicine, National Defense Medical College, Tokorozawa, Japan, 2.Division of Diagnostic and Therapeutic Endoscopy, National Defense Medical College, Tokorozawa, Japan, 3.Department of Surgery, National Defense Medical College, Tokorozawa, Japan)

^○Nobutsugu Abe, Yoshikazu Hashimoto, Masanori Sugiyama (Dept. of Surgery, Kyorin University, Japan)

^○Yuichi Waragai¹, Takuto Hikichi², Katsutoshi Obara² (1.Dept. of Gastroenterology and Rheumatology, Div. of Medicine, Fukushima Medical University School of Medicine, Japan, 2.Department of Endoscopy, Fukushima Medical University Hospital)

^○Yohei Minato¹, Ken Ohata¹, Masahiko Murakami² (1.Dept. of Gastroenterology, NTT Medical Center, Tokyo, Japan, 2.Dept. of Gastroenterology and General Surgery, Showa Univ., Tokyo, Japan)

^○Noboru Kawata¹, Masanori Tokunaga², Hiroyuki Ono¹ (1.Div. of Endoscopy, Shizuoka Cancer Center, Shizuoka, Japan, 2.Division of Gastric surgery, Shizuoka Cancer Center, Shizuoka, Japan)

^○Hiroyuki Aoyagi¹, Yoshiaki Hayashi¹, Yasuharu Kaizaki² (1.Dept. of Gastroenterology, Fukui Prefectural Hospital, Fukui, Japan, 2.Department of Surgery, Fukui Prefectural Hospital, Fukui, Japan)

^○Yoshiro Tamegai¹, Yosuke Fukunaga², Masahiro Igarashi¹ (1.Endoscopy Division, Cancer Institute Hospital, Tokyo, Japan, 2.Dept. of Surgery , Cancer Institute Hospital, Tokyo, Japan)

^○Yasuyuki Seto (Dept. of Gastrointestinal Surgery, The University of Tokyo, Graduate School of Medicine, Japan)