^○Wataru Ueda, Tetuya Aoki, Kiyotaka Okawa (Dept. of Gastroenterology, Osaka City Juso Hospital, Osaka,Japan)

^○Hiroshi Fujita¹, Mitsuo Nagasaka², Ichiro Hirata² (1.Dept. of Gastroenterology, Nissin Orido Hospital, Aichi, Japan., 2.Dept. of Gastroenterology, Sch. of Med. Fujita Health University, Aichi, Japan)

^○Keisuke Kanda, Tatsuo Morinushi, Nobuto Hirata (Dept. of Gastroenterology, Kameda Medical Center, Chiba, Japan)

^○Takahito Takezawa, Masahiro Okada, Hironori Yamamoto (Div. of Gastroenterology, Dept. of Medicine, Jichi Med. Univ. Tochigi, Japan)

^○Masashi Saito¹, Masanao Nakamura¹, Hidemi Goto^1,2 (1.Dept. of Gastroenterology and Hepatology,Nagoya University Graduate School of Medicine,Nagoya,Japan, 2.Department of Endoscopy,Nagoya University Hospital,Nagoya,Japan)

^○Saori Matsui¹, Atsushi Sugahara¹, Tsuyoshi Fujita² (1.Dept. of Gastroenterology,Yodogawa Christian Hospital, Japan, 2.Dept. of Health Care Promotion Center,Yodogawa Christian Hospital)

^○Ryosaku Tomiyama, Noriya Nakachi, Hiroto Shimajiri (Dept. of Internal Medicine, Naha City Hospital, Okinawa, Japan)

^○Noriyuki Horiki¹, Yoshiyuki Fujita², Yoshiyuki Takei³ (1.Dep. of Endoscopy, Mie University Hospital, Tsu, Japan, 2.St. Luke's International Hospital, Tokyo, Japan, 3.Department of Gastroenterology and Hepatology, Mie University School of Medicine, Tsu, Japan)

^○Yuko Sakakibara, Takuya Yamada, Eiji Mita (Dept. of Gastroenterology and Hepatology,Osaka National Hospital, Japan)

^○Takashi Fujiwara¹, Koichi Koizumi¹, shinichiro Horiguchi² (1.Dept. of Gastroenterology, Tokyo Metropolitan Cancer Center and Infectious Disease Center Komagome Hospital, Tokyo, Japan, 2.Department of Pathology, Tokyo Metropolitan Cancer Center and Infectious Disease Center Komagome Hospital, Tokyo, Japan)

^○Shoko Ono¹, Mototsugu Kato¹, Naoya Sakamoto² (1.Div. of Endoscopy, Hokkaido University Hospital, Japan, 2.Department of Gastroenterology, Hokkaido University Graduate school of medicine)

^○Atsuhiro Hirayama, Seiichi Daikuhara, Tomoaki Suga (Div. of Gastroenterology and Hepatology, Dept. of Internal Medicine, Sch. of Med. Shinshu Univ., Nagano, Japan)

^○Takuya Inoue, Kazuki Kakimoto, Kazuhide Higuchi (Second Dept. of Internal Medicine, Osaka Medical College, Japan)

^○Kazuhito Kani, Shingo Kato, Koji Yakabi (Dept. of Gastroenterology and Hepatology, Saitama Medical Center, Saitama Medical University, Saitama, Japan)