^○Katsuhiro Mabe¹, Shinji Yoshii², Mototsugu Kato³ (1.Dep. of Cancer Preventive Medicine, Hokkaido Univ. Graduate Sch. of Med.,Sapporo , Japan, 2.Dep. of Gastroenterology, NTT East Sapporo Hospital, 3.Div. of Endoscopy, Hokkaido University Hospital)

^○Atsushi Majima, Osamu Handa, Yuji Naito (Dept. of Gastroenterology and Hepatology, Sch. of Kyoto Prefectural University of Medicine, Kyoto, Japan)

^○Masaaki Kodama, Tadayoshi Okimoto, Kazunari Murakami (Dep. Gastroenterology, Faculty of Medicine, Oita University, Oita, Japan)

^○Masaaki Kobayashi¹, Yuichi Sato², Shuji Terai² (1.Dept. of Endoscopy, Niigata University Medical and Dental Hospital, Niigata, Japan, 2.Division of Gastroenterology, Niigata University Medical and Dental Hospital, Niigata, Japan)

^○Akiko Shiotani, Takahisa Murao, Ken Haruma (Div. of Gastroenterology, Dept. of Internal Medicine, Kawasaki Medical School, Kurashiki, Japan)

^○Akihiro Yamada, Shu Hoteya, mitsuru Kaise (Dept. of Gastroenterology and Digestive Endoscopy Unit, Japan)

^○Daisuke Yoshimura¹, Rie Yoshimura², Toshiaki Ochiai¹ (1.Div. of Gastroenterology, Saiseikai Fukuoka General Hospital, Fukuoka, Japan, 2.Hakuaikai Wellness Tenjin Clinic, Fukuoka, Japan)

^○Ken Onita, Hajime Isomoto, Saburo Shikuwa (Dept. of Gastroenterology and Hepatology, Nagasaki University Hospital, Japan)

^○Yusuke Muramatsu¹, Junko Fujisaki¹, Noriko Yamamoto² (1.Div. of Gastroenterology, Cancer Institute Hospital of Jfcr, Tokyo, Japan, 2.Div. of Pathology, Cancer Institute Hospital of JFCR, Tokyo, Japan)

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

^○hiroya ueyama¹, Takashi Yao², sumio watanabe¹ (1.Dept. of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan, 2.Department of Human pathology, Juntendo University School of Medicine, Tokyo, Japan)

^○Hiroki Yaita¹, Koichi Kurahara¹, Yumi Oshiro² (1.Div. of Gastroenterology, Matsuyama Red Cross Hospital, Ehime, Japan, 2.Department of Pathology, Matsuyama Red Cross Hospital, Ehime, Japan)

^○Yasushi Yamasaki, Ryu Ishihara, Takashi Kanesaka (Dept. of Gastrointestinal Oncology, Osaka Medical Center For Cancer and Cardiovascular Diseases, Osaka, Japan)

^○Tomoyuki Yada, Naoki Akazawa, Hitohiko Koizuka (Dept. of Gastroenterology & Hepatology, Kohnodai Hospital, National Center For Global Health and Medicine, Chiba, Japan)