1 Department of Medicine, Teikyo University School of Medicine, 2-11-1, Kaga, Itabashi-ku, Tokyo, 173-8605, Japan. a-tanaka@med.teikyo-u.ac.jp.
2 Health Labor Science Research Grants from Research on Measures for Intractable Diseases, the Intractable Hepato-Biliary Diseases Study Group in Japan, Tokyo, Japan. a-tanaka@med.teikyo-u.ac.jp.
3 Department of Medicine, Teikyo University School of Medicine, 2-11-1, Kaga, Itabashi-ku, Tokyo, 173-8605, Japan.
4 Health Labor Science Research Grants from Research on Measures for Intractable Diseases, the Intractable Hepato-Biliary Diseases Study Group in Japan, Tokyo, Japan.
5 Department of Gastroenterology and Hepatology, Faculty of Medicine, Saitama Medical University, Saitama, Japan.
6 The Japan Society of Hepatology, Tokyo, Japan.
7 Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
8 Division of Gastroenterology, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan.
9 The Japanese Society of Gastroenterology, Tokyo, Japan.
10 Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan.