1. Department of Gastroenterology and Hepatology Yokohama City University Yokohama Japan
2. Department of Gastroenterology Aichi Cancer Center Nagoya Japan
3. Department of Oncology Yokohama City University Yokohama Japan
4. Department of Gastroenterological Surgery Yokohama City University Yokohama Japan
5. Department of Gastroenterological Surgery Aichi Cancer Center Nagoya Japan
6. Department of Endoscopy Aichi Cancer Center Nagoya Japan
7. Department of Radiology Yokohama City University Yokohama Japan
8. Department of Diagnostic and Interventional Radiology Aichi Cancer Center Nagoya Japan