1. Department of Pathology, Fukuoka, University Chikushi Hospital, Fukuoka, Japan
2. Department of Endoscopy, Fukuoka University Chikushi Hospital, Fukuoka, Japan
3. Department of Gastroenterology, Fukuoka University Chikushi Hospital, Fukuoka, Japan
4. Department of Gastroenterology, Oita Red Cross Hospital, Oita, Japan
5. Department of Pathology, Faculty of Medicine, Oita University, Oita, Jpaan
6. Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan