1. Department of Hepatobiliary and Pancreatic Surgery Graduate School of Medicine Gunma University Maebashi Japan
2. Department of General Surgical Science Graduate School of Medicine Gunma University Maebashi Japan
3. Department of Innovative Cancer Immunotherapy Graduate School of Medicine Gunma University Maebashi Japan
4. Gunma University Initiative for Advanced Research (GIAR) Gunma University Maebashi Japan
5. Department of Pathology and Microbiology Graduate School of Medicine, Saga University Saga Japan