Kazunaga Ishigaki 1, Yousuke Nakai 1, Naoki Sasahira 2, Kazuya Sugimori 3, Katsuya Kitamura 4, 5, Tomohisa Iwai 6, Saburo Matsubara 7, Kenji Shimura 8, Takao Itoi 9, Shomei Ryozawa 10, Jun Ushio 11, Shinpei Doi 12, Hiroo Imazu 13, Iruru Maetani 14, Hiroyuki Isayama 15
1 Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
2 Department of Gastroenterology, The Cancer Institute Hospital Of JFCR, Tokyo, Japan
3 Department of Gastroenterology, Yokohama City University Medical center, Kanagawa, Japan
4 Department of Gastroenterology and Hepatology, Tokyo Medical University Hachioji Medical Center, Tokyo, Japan
5 Division of Gastroenterology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan
6 Department of Gastroenterology, Kitasato University Hospital, Kanagawa, Japan
7 Department of Gastroenterology and Hepatology, Saitama Medical Center, Saitama Medical University, Saitama, Japan
8 Department of Gastroenterology, Asahi General Hosital, Chiba, Japan
9 Department of Gastroenterology, Tokyo Medical University Hospital, Tokyo, Japan
10 Department of Gastroenterology, Saitama Medical University International Medical Center, Saitama, Japan
11 Department of Gastroenterology, Jichi Medical University Hospital, Tochigi, Japan
12 Department of Gastroenterology, Teikyo University Mizonokuchi Hospital, Kanagawa, Japan
13 Department of Gastroenterology, Nihon University Itabashi Hospital, Tokyo, Japan
14 Division of Gastroenterology and Hepatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
15 Department of Gastroenterology, Graduate School of Medicine, Juntendo University, Tokyo, Japan