^○Kimika Akazawa¹, Takeshi Ichikawa¹, Akira Fujimura¹, Hiroaki kaneko¹, Akira Temmoku¹, Ryoujyu Negishi¹, Masataka Kamino¹, Hiroshi Sasaki¹, Nobuaki Machida¹, Sae Ookubo¹, Idumi Aoki¹, Itaru Ooi¹, Yoshiyuki Tawa¹, Masayuki Fujino² (1.Dept. of Gastroenterology,Itabashi Chuo Medical Center,Tokyo,Japan, 2.Hasune Royal Clinic,Tokyo,Japan)

^○Kousaku Morimoto, Yuuki Tohi, Hiroyuki Kageyama, Mamoru Nishimura, Jirou Namba (Digestive Disease Center,Okayama City Hospital,Okayama,Japan)

^○Nobuatsu Koyama¹, Naoyuki Yamasita¹, Fumihiko Ando¹, Tomohiro Shimoda¹, Katuji Okada² (1.Div. of Dept. of Surgery, Tsuboi Hospital, Fukusima, Japan, 2.Div. of Dept. of Digestive medicine, Tsuboi Hospital, Fukusima, Japan)

^○Yuko Kita¹, Ayako Kagawa², Fumihiko Kinekawa¹, Katsuyuki Nakao¹, Toshihiko Inoue¹, Tsutomu Masaki³ (1.Dev. of Internal Medicine, Sanuki Municipal Hospital, Kagawa, Japan, 2.Health Care Center, Sanuki Municipal Hospital, Kagawa, Japan, 3.Dept. of Gastroenterology & Neurology, Kgagawa univ., Kagawa, Japan)

^○Hiromi Ono^1,2, Choichi Sugawa² (1.Dept. of Internal Medicine, Seiwa Memorial Hospital, Sapporo, Japan, 2.Dept. of Surgery, Wayne State Univ., Detroit, MI, United States)