1. Department of Gastroenterology, Gifu University Graduate School of Medicine, Gifu, Japan
2. Department of Informative Clinical Medicine, Gifu University Graduate School of Medicine, Gifu, Japan
3. Department of Tumor Pathology, Gifu University Graduate School of Medicine, Gifu, Japan
4. Division of Pathology, Gifu Municipal Hospital, Gifu, Japan
5. Department of Medicine, Columbia University, New York, NY, USA