1. Department of Hepatobiliary and Pancreatic Surgery National Cancer Center Hospital East Kashiwa Japan
2. Department of Gastroenterological Surgery Transplant and Surgical Oncology Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences Okayama Japan
3. Division of Pathology, Exploratory Oncology Research & Clinical Trial Center National Cancer Center Kashiwa Japan
4. Division of Cancer Immunotherapy Exploratory Oncology Research & Clinical Trial Center, National Cancer Center Kashiwa Japan
5. General Medical Education and Research Center Teikyo University Tokyo Japan
6. Department of Pathology Keio University School of Medicine Tokyo Japan
7. Department of Pathology and Clinical Laboratories National Cancer Center Hospital East Kashiwa Japan
8. Exploratory Oncology Research & Clinical Trial Center National Cancer Center Kashiwa Japan