1. Department of Molecular Gastroenterology and Hepatology, North Medical Center Kyoto Prefectural University of Medicine, Kyoto, Japan
2. Department of Surgical Pathology, North Medical Center Kyoto Prefectural University of Medicine, Kyoto, Japan
3. Department of Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kyoto, Japan
4. Department of Gastroenterology, Otsu City Hospital, Shiga, Japan