1. Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
2. Department of Gastroenterology, Fukuchiyama City Hospital, Kyoto
3. 3Department of Gastroenterology, Osaka General Hospital of West Japan, Railway Company, Osaka
4. Department of Surgical Pathology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
5. Gastroenterology Unit, Faculty of Medicine, Universiti Teknologi MARA, Shah Alam, Malaysia