1. Department of Gastroenterology, Fukuoka University Chikushi Hospital, Chikushino City, Japan
2. Department of Endoscopy, Fukuoka University Chikushi Hospital, Chikushino City, Japan
3. Department of Pathology,Fukuoka University Chikushi Hospital, Chikushino City, Japan
4. Department of Radiology, Fukuoka University Chikushi Hospital, Chikushino City, Japan.