1. Division of Endoscopy, Shizuoka Cancer Center, Shizuoka, Japan
2. Division of Molecular Biology and Biochemistry, Graduate School of Medicine, Osaka University, Osaka, Japan
3. Division of Pathology, Shizuoka Cancer Center, Shizuoka, Japan
4. Division of Hepato-Biliary-Pancreatic Surgery, Shizuoka Cancer Center, Shizuoka, Japan
5. Division of Clinical Trials, Shizuoka Cancer Center, Shizuoka, Japan