^○Yuushi Hisada¹, Daisuke Kawamura¹, Norihiro Okamoto² (1.Dept. of Internal Midicine, Kenwakai Otemachi Hospital, Fukuoka, Japan, 2.Dept. of Internal Midicine, Saiseikai Karatsu Hospital, Saga, Japan)

^○Tadashi Bando^1,2, Kenta Sukekawa^1,3, Soushi Oosawa^1,3, Tetsuro Shimizu¹, Momoko Akashi², Kenichiro Tsukada², Shinnya Iwamoto², Yoshiro Kashii², Kazuhiro Tsukada³ (1.Dept. of Surgery, Saiseikai Toyama Hosp., Toyama, Japan, 2.div. of Gastrointestinal endoscopy, Saiseikai Toyama Hosp., Toyama, Japan, 3.2nd. Dept. of Surgery, Toyama Univ., Toyama, Japan)

^○Satoshi Shinozaki^1,2, Yoshimasa Miura², Yuji Ino², Hironori Yamamoto² (1.Shinozaki Medical Clinic, Tochigi, Japan, 2.Division of Gastroenterology, Department of Medicine, Jichi Medical University, Tochigi, Japan)

^○Hideo Suzuki¹, Daisuke Akutsu², Toshiaki Narasaka¹, Tsuyoshi Kaneko², Hirofumi Matsui¹, Yuji Mizokami¹, Ichinosuke Hyodo² (1.Gastrointestinal Endoscopy Division, University of Tsukuba Hospital, Japan, 2.Department of Gastroenterology and Hepatology, University of Tsukuba)