1 Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan.
2 Akasaka Sanno Medical Center, International University of Health and Welfare, Tokyo, Japan.
3 Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Ehime, Japan.
4 Department of Medicine, Kurume University School of Medicine, Kurume, Japan.
5 Department of Medicine, Division of Gastroenterology and Hepatology, Shinshu University School of Medicine, Matsumoto, Japan.
6 Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan.
7 Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan.
8 Center for Gastroenterology, Teine Keijinkai Hospital, Sapporo, Japan.
9 Department of Hepatology, Toranomon Hospital, Kawasaki, Japan.
10 Department of Pediatric Hepatology and Gastroenterology, Saiseikai Yokohamashi Tobu Hospital, Yokohama, Japan.
11 Department of Gastroenterology and Hepatology, The Third Hospital of Jikei University School of Medicine, Tokyo, Japan.
12 Department of Human Pathology, Kanazawa University Graduate School of Medicine, Kanazawa, Japan.
13 Second Department of Internal Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan.
14 Department of Hepatology, Sendai Kousei Hospital, Sendai, Japan.
15 Department of Gastroenterology and Hepatology, Juntendo University Shizuoka Hospital, Izunokuni, Japan.
16 Department of Pathology and Laboratory Medicine, Institute of Biomedical Sciences, Tokushima University Graduate School, Takushima, Japan.
17 Department of Medicine, Teikyo University School of Medicine, Tokyo, Japan.