1. Department of Diagnostic Ultrasound & Interventional Radiology, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
2. Department of Radiology, NTT Medical Center Tokyo, Tokyo, Japan
3. Department of Diagnostic and Interventional Radiology, Aichi Cancer Center, Nagoya, Japan
4. Division of Hepatobiliary and Pancreatic Surgery, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
5. Department of Gastroenterological Surgery, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
6. Department of Gastroenterological Surgery, Aichi Cancer Center, Nagoya, Japan