1. Division of Hepatobiliary and Pancreatic Surgery Department of General Surgical Science Graduate School of Medicine Gunma University Maebashi Japan
2. Research Program for Omics‐based Medical Science Division of Integrated Oncology Research Gunma University Initiative for Advanced Research (GIAR) Maebashi Japan
3. Department of Diagnostic Pathology Graduate School of Medicine Gunma University Maebashi Japan
4. Division of Gastroenterology Graduate School of Medicine Tohoku University Sendai Japan
5. Department of Molecular Target Medicine Aichi Medical University School of Medicine Nagakute Japan
6. Division of Gastroenterological Surgery Department of General Surgical Science Graduate School of Medicine Gunma University Maebashi Japan