^○Yoichiro Aoki¹, Koichi Ito¹, Keigo Suzuki¹, Koki Okubo¹, Tomoyuki Yada¹, Naoki Akazawa¹, Hitohiko Koizuka¹, Daizo Saito², Naomi Uemura¹ (1.Gastroenterology & Hepatology, Kohnodai Hospital, National Center For Global Health and Medicine, Ichikawa,Japan, 2.Nihonbashi daizo clinic,Tokyo, Japan)

^○Shuichi Miyamoto¹, Mototsugu Kato², Masayoshi Ono¹, Momoko Tsuda¹, Saori Omori¹, Masakazu Takahashi¹, Takeshi Mizushima¹, Shoko Ono², Yasuaki Mori¹, Katsuhiro Mabe³, Manabu Nakagawa¹, Soichi Nakagawa¹, Yuichi Shimizu¹, Naoya Sakamoto¹ (1.Dept. of Gastroenterology and Hepatology Div. of Endoscopy Hokkaido University Hospital, Japan, 2.Department of Gastroenterology and Hepatology Division of Endoscopy Hokkaido University Hospital, 3.Department of Gastroenterology and Hepatology Division of Endoscopy Hokkaido University Hospital)

^○Akihiro Takahashi, Hideyuki Chiba, Daisuke Kurihara, Takuma Suto, Keiichi Ashikari, Naoya Kawano, Shihoko Seki, Shinshuke Tsuruta, Tomonori Ida, Taiki Morohashi, Toru Goto (Omori Red Cross Hospital,Tokyo,Japan)

^○Shigeyuki Kobayashi, Akitoshi Sano, akinobu koiwai, chieko ogawa, shozan tobisawa, satoshi yokosawa, noriatu kanno (Iwate Prefectual Iwai Hospital, Div.Of Gastroenterology, Japan)

^○Masaya Uesato, Yorihiko Mutou, Yoshihide Senba, Ryoma Urahama, Yukiko Ogura, Hiroshi Suito, Akira Nakano, Mizuho Aikawa, Naoyuki Hanari, Hisashi Gunji, Masayuki Kano, Hisahiro Matsubara (Dept. of Frontier Surgery, Sch. of Med. Chiba Univ., Chiba, Japan)