1. Department of Medicine; Teikyo University School of Medicine; Tokyo Japan
2. The Intractable Hepato-Biliary Diseases Study Group in Japan
3. Division of Gastroenterology, Department of Internal Medicine; Hyogo College of Medicine; Hyogo Japan
4. The Japanese Society of Gastroenterology
5. Division of Gastroenterology; Tohoku University Graduate School of Medicine; Sendai Japan
6. Department of Gastroenterology and Hepatology, Faculty of Medicine; Saitama Medical University; Moroyama Japan
7. The Japan Society of Hepatology
8. Department of Gastroenterology, Graduate School of Medicine; The University of Tokyo; Tokyo Japan