1. Division of Pathology; Exploratory Oncology Research & Clinical Trial Center; National Cancer Center; Kashiwa Japan
2. Division of Surgical Oncology; Department of Surgery; Nagoya University Graduate School of Medicine; Kashiwa Japan
3. Department of Surgical Oncology; National Cancer Center Hospital East; Kashiwa Japan
4. Division of Hepatobilliary and Pancreatic Surgery; National Cancer Center Hospital East; Kashiwa Japan