^○Shinsuke Kazama, Toshiaki Watanabe (Div. of Surgical Oncology, Dept. of Surgery, The University of Tokyo, Tokyo, Japan)

^○Takashi Hisabe¹, Toshiyuki Matsui¹, Akinori Iwashita² (1.Dept. of Gastroenterology, Fukuoka University Chikushi Hospital, Chikushino, Japan, 2.Department of Pathology, Fukuoka University Chikushi Hospital, Chikushino, J apan)

^○Kiyonori Kobayashi¹, Miwa Sada², Wasaburo Koizumi² (1.Research and Development Center For New Medical Frontiers, Kitasato Univ., Sch. of Med., Sagamihara, Japan, 2.Dept. of Gastroenterology, Kitasato Univ., Sch. of Med., Sagamihara, Japan)

^○Nobuyuki Hida¹, Motoi Uchino², Shiro Nakamura¹ (1.Div. of Internal Medicine, Dept. of Inflammatory Bowel Disease, Hyogo College of Medicine, Hyogo, Japan, 2.Division of Surgery, Department of Inflammatory Bowel Disease, Hyogo College of Medicine, Hyogo, Japan)

^○Keisuke Hata, HIROYUKI ANZAI, Toshiaki Watanabe (Dept. of Surgical Oncology, The Univ. of Tokyo, Tokyo, Japan)

^○Makoto Naganuma¹, Yasushi Iwao², Takanori Kanai³ (1.Center For Diagnotsic and Therapeutic Endoscopy, Japan, 2.Department of Preventive Medicine, Keio University, 3.Department of Gastroenterology and Hepatology, , Keio University)

^○Naoko Nakano¹, Ichiro Hirata¹, Makoto Watanabe^1,2 (1.Dept. of Gastroenterology, Fujita Health University School of Med.,Aichi,Japan, 2.Watanabe clinic,Toyota city,Aichi,Japan)

^○Soki Nishiyama¹, Shinji Tanaka¹, Kazuaki Chayama² (1.Endoscopy and Medicine, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan, 2.1Gastroenterology and Metabolism, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan)

^○kazuo Otsuka, Yoshiki Wada, Mamoru Watanabe (Dept. of Endoscopy, Tokyo Medical and Dental Univ., Tokyo, Japan)

^○Kenichi Mizuno¹, Junji Yokoyama², Yoichi Ajioka³ (1.Dept. of Endoscopy, Niigata University Medical and Dental Hospital, Niigata, Japan, 2.Division of Gastroenterology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan, 3.Division of Molecular and Diagnostic Pathology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan)

^○Akihiro Ito, Sei Kurokawa, Akimichi Imamura (Sappro Kousei Hospital, Sapporo, Japan)

^○Yutaka Yano, Fumihito Hirai, Toshiyuki Matsui (Dept. of Gastroenterology, Fukuoka University Chikushi Hospital, Japan)

^○Tomohiro Yukawa¹, Hirokazu Yamagami¹, Kiyoshi Maeda² (1.Dept. of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan, 2.Department of Surgical Oncology, Osaka City University Graduate School of Medicine, Osaka, Japan)