1. Department of Hepatology Osaka City University Graduate School of Medicine Osaka Japan
2. Department of Hepatology Tokyo Metropolitan Komagome Hospital Tokyo Japan
3. Department of Hepatology Osaka City General Hospital Osaka Japan
4. Department of Internal Medicine, Division of Gastroenterology and Hepatology Hyogo College of Medicine Nishinomiya Japan
5. Genome Medical Sciences Project, National Center for Global Health and Medicine Tokyo Japan