1. Follow‐up Survey Committee Japan Liver Cancer Association Osaka Japan
2. Department of Internal Medicine Division of Gastroenterology and Hepatology Hyogo College of Medicine Nishinomiya Hyogo Japan
3. Department of Gastroenterology and Hepatology Kindai University Faculty of Medicine Osaka‐Sayama Osaka Japan
4. Department of Hepato‐Biliary‐Pancreatic Surgery Osaka Metropolitan University Graduate School of Medicine Osaka Japan
5. Department of Gastroenterology Musashino Red Cross Hospital Tokyo Japan
6. School of Medicine International University of Health and Welfare Tokyo Japan
7. Department of Gastroenterology Juntendo University School of Medicine Tokyo Japan
8. Department of Gastroenterology Graduate School of Medicine The University of Tokyo Tokyo Japan
9. Department of Clinical Laboratory Medicine Kurume University Hospital Kurume Japan
10. Division of Hepato‐Biliary‐Pancreatic Surgery Department of Surgery Kobe University Graduate School of Medicine Kobe Japan
11. Department of Biostatistics School of Public Health University of Tokyo Tokyo Japan
12. Department of Diagnostic and Interventional Radiology Kobe University Graduate School of Medicine Kobe Japan
13. National Clinical Database Tokyo Japan
14. Department of Healthcare Quality Assessment Graduate School of Medicine The University of Tokyo Tokyo Japan
15. National Center for Global Health and Medicine Tokyo Japan