1. Division of Gastrointestinal Oncology; Shizuoka Cancer Center; Shizuoka Japan
2. Division of Endoscopy; Shizuoka Cancer Center; Shizuoka Japan
3. Division of Pathology; Shizuoka Cancer Center; Shizuoka Japan
4. Division of Hepato-biliary-pancreas Surgery; Shizuoka Cancer Center; Shizuoka Japan