1. Ultrasound Imaging CenterHyogo College of Medicine Nishinomiya Hyogo Japan
2. Division of Hepatobiliary and Pancreatic Disease, Department of Internal MedicineHyogo College of Medicine Nishinomiya Hyogo Japan
3. Department of Gastroenterology and HepatologyOgaki Municipal Hospital Ogaki Gifu Japan
4. Department of Surgical Pathology Nishinomiya Hyogo Japan
5. Department of SurgeryHyogo College of Medicine Nishinomiya Hyogo Japan