^○Takashi Ohta, Atsushi Maeda, Kenji Fukumoto, Naoki Mizutani, Yuta Myojin, Hiroki Murai, Akira Doi, Rui Mizumoto, Yuki Arimoto, Mayura Toda, Takeshi Nakamura, Ichiyo Itose, Yoshiki Ito, Hideki Hagiwara, Norio Hayashi (Dept. of Gastroenterology, Kansai Rosai Hospital, Hyogo, Japan)

^○Kenichiro Nakachi, mikitaka iguchi, jun kato, yoshimasa maeda, Kosaku Moribata, yoshiyuki mori, Naoki Shingaki, Hisanobu Deguchi, Kazuki Ueda, izumi inoue, Takao Maekita, Hideyuki Tamai, Masao Ichinose (Second Dept. of Internal Medicine, Wakayama Medical University, Wakayama, Japan)

^○miou saitou, takashi yoshida, hideo mitsui, nobuo kanazawa, koujirou kuroiwa (Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology,Tokyo,Japan)

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

^○Jeongmin Choi, Sang Gyun Kim, Joo Sung Kim, Hyun Chae Jung (Inje University Sanggye Paik Hospital, South Korea)