1. Department of Medicine, Division of Gastroenterology and Hepatology Shinshu University School of Medicine Matsumoto Japan
2. Department of Health Promotion Medicine Shinshu University School of Medicine Matsumoto Japan
3. Department of Advanced Endoscopic Therapy Shinshu University School of Medicine Matsumoto Japan
4. Consultation Center for Liver Diseases Shinshu University Hospital Matsumoto Japan