1. Department of Hepatology, Graduate School of Medicine Osaka Metropolitan University Osaka Japan
2. Department of Premier Preventive Medicine, Graduate School of Medicine Osaka Metropolitan University Osaka Japan
3. Department of Diagnostic and Interventional Radiology, Graduate School of Medicine Osaka Metropolitan University Osaka Japan
4. Department of Hepato‐Biliary‐Pancreatic Surgery, Graduate School of Medicine Osaka Metropolitan University Osaka Japan