^○Masaki Ominami, Yasuaki Nagami, Kazunari Tominaga (Dept. of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan)

^○Yasumasa Matsuo, Hiroshi Yasuda, FUMIO Ito (Dept. of Gastroenterology and Hepatology, St. Marianna University School of Medicine, Kawasaki , Japan.)

^○Ryousuke Ota, Kei Tominaga, Hisashi Doyama (Dept. of Gastroenterology, Ishikawa Prefectural Central Hospital, Ishikawa, Japan)

^○Hitomi Kikuchi¹, Takuto Hikichi², Katsutoshi Obara² (1.Dep. of Gastroenterology and Rheumatology, Sch. of Med. Fukushima Medical Univ., Fukushima, Japan, 2.Dep. of Endoscopy, Hospital of Fukushima Medical Univ., Fukushima, Japan)

^○Hajime Ishii, Tsuyotoshi Tsuji, Kunio Nakane (Dept. of Gastoroenterology, Akita City Hospital, Akita, Japan)

^○Kengo Takimoto, Tomohiro Yamaguchi (Dept. of Gastroenterology, Takeda General Hospital, Kyoto, Japan)

^○Saeko Kushida, Masahiro Tsuda, Hideto Inokuchi (Dep. of Gastroenterological Oncology, Hyogo Cancer Center., Hyogo, Japan)

^○Makoto Fukuoka, Masato Komori, Harumasa Yoshihara (Dept. of Gastroenterology, Osaka Rosai Hospital, Osaka, Japan)

^○Hirofumi Kogure, Hiroyuki Isayama, Kazuhiko Koike (Dept. of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan)

^○Kojiro Nakase, Naokuni Sakiyama, Koji Uno (Dept. of Gastroenterology, Kyoto Second Red-Cross Hospital, Japan)

^○Takeshi Miyata, Masayuki Kitano, Masatoshi Kudo (Dept. of Gastroenterology and Hepatology, Kinki Univ, Osaka, Japan)

^○Keiji Takahashi¹, Shinei Kudo², Haruhiko Ogata³ (1.Matsushima Hospital Colorectal Disease Center-Matsushima Clinic,Yokohama-City, Kanagawa, Japan, 2.Showa University Northern Yokohama Hospital, Digestive Disease Center, Yokohama-city, Kanagawa, 3.Keio University School of Medicine, Center for Diagnostic and Therapeutic Endoscopy, Shinjuku-ku, Tokyo)

^○Makoto Ozaki (Dept. of Anesthesiology, Tokyo Women'S Medical University, Japan)