^○Masahiro Miyata, Naoki Omiya, Ichiro Hirata (Dept. of Gastroenterology, Fujita Health University,Aichi,Japan)

^○Noriyuki Ogata¹, kazuo Otsuka^1,2, Shinei Kudo¹ (1.Digestive Disease Center, Showa University Northern Yokohama Hospital, Japan, 2.Endoscopy Unit, Tokyo Medical and Dental University Hospital)

^○Naoki Hosoe, Makoto Naganuma, Haruhiko Ogata (Center For Diagnostic Therapeutic Endoscopy, School of Med. Keio University, Tokyo, Japan)

^○Yasuyuki Mizutani¹, Masanao Nakamura¹, Hidemi Goto^1,2 (1.Dept. of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya, Japan., 2.Department of Endoscopy, Nagoya University Hospital, Nagoya, Japan.)

^○Yohei Minato¹, Ken Ohata¹, Shinichi Ban² (1.Dept. of Gastroenterology, NTT Medical Center Tokyo, Tokyo, Japan, 2.Dept. of Diagnostic Pathology, Saiseikai Kawaguchi General Hospital, Saitama, Japan)

^○Shiro Oka¹, Shinji Tanaka¹, Kazuaki Chayama² (1.Dept. of Endoscopy, Hiroshima Univ., Hiroshima, Japan, 2.Dept. of Gastroenterology and Metabolism, Hiroshima Univ., Hiroshima, Japan)

^○Masaki Katsurahara¹, Takashi Kitade¹, Yoshiyuki Takei² (1.Dep. of Endoscopic Medicine, Mie University Graduate School of Medicine, Mie, Japan, 2.Dep. of Gastroenterology and Hepatology, Mie University Graduate School of medicine, Mie, Japan)

^○Wataru Honda, Satoshi Nakano, Mieko Ebata (Brother Kinen Hospital, Nagoya, Japan)

^○Tomoki Fujita, Eriko Waga, Shinichi Katsuki (Dept. of The Center of Gastroenterology, Otaru Ekisaikai Hospital , Japan)

^○Ryota Niikura, Atsuo Yamada, Kazuhiko Koike (Dept. of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan)

^○Yasumasa Tada¹, Takafumi Yuki², Yoshikazu Kinoshita¹ (1.Div. of Internal Medicine 2, Shimane Univercity School of Medicene, Izumo, Japan, 2.Div. of Gastrointestinal Endoscopy, Shimane Univercity School of medicene, Izumo, Japan)

^○Motohiro Esaki¹, Takayuki Matsumoto², Yasuo Suzuki³ (1.Dept. of Medicine and Clinical Science, Kyushu University, Japan, 2.Division of Gastroenterology, Department of Internal Medicine, Faculty of Medicine, Iwate Medical University, 3.Toho University Medical Center Sakura Hospital)

^○Hiroshi Hasegawa, Shigeki Banba, Akira Andoh (Dept. of Gastroenterology, Shiga University of Medical Science, Japan)

^○Akihito Ehara, Keigo Mitsui, Choitsu Sakamoto (Dept. of Gastroenterology, Nippon Medical School, Graduate School of Medicine, Tokyo, Japan)

^○Shizuki Yanagihara, Sei Kurokawa, Yoshiyuki Watanabe (Dept. of Gastroenterology, Hokkaido P.W.F.A.C Sapporo-Kosei General Hospital, Sappro, Japan)

^○Yasuhiro Maruyama, satoshi Kobayashi, Tomoaki Suga (Dept. of Gastroenterology, Shinshu University School of Medicine, Nagano, Japan)

^○Akira Tari¹, Hideki Asaoku², Tadashi Yoshino³ (1.Dept. of Internal Medicine, Hiroshima Red Cross Hospital and Atomic-Bomb Survivors Hospital, Hiroshima, Japan, 2.Department of Clinical Laboratory, Hiroshima Red Cross Hospital and Atomic-Bomb Survivors Hospital, Hiroshima, Japan, 3.Department of Pathology, Okayama University, Okayama, Japan)

^○Hiroyuki Odagiri^1,2, Hideo Yasunaga¹, Hiroki Matsui¹ (1.Dept. of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan, 2.Department of Gastroenterology, Saiseikai Kawaguchi General Hospital, Saitama, Japan)