1. Department of Gastroenterological, Breast and Endocrine Surgery Yamaguchi University Graduate School of Medicine Yamaguchi Japan
2. Department of Gastroenterological Surgery Graduate School of Medicine Osaka University Osaka Japan
3. Department of Surgery Osaka International Cancer Institute Osaka Japan
4. Department of Gastroenterological surgery Osaka General Medical Center Osaka Japan
5. Department of Radiology Yamaguchi University Graduate School of Medicine Yamaguchi Japan
6. Department of Diagnostic pathology Yamaguchi University Hospital Yamaguchi Japan