1. Department of Gastrointestinal Oncology; Osaka Medical Center for Cancer and Cardiovascular Disease; Osaka Japan
2. Division of Gastroenterology and Hepatology, Department of Medicine; Nihon University School of Medicine; Tokyo Japan
3. Endoscopy Division; National Cancer Center Hospital; Tokyo Japan
4. Department of Gastroenterology; Teine Keijinkai Hospital; Sapporo Japan
5. Division of Gastroenterology, Department of Internal Medicine; Kobe University Graduate School of Medicine; Kobe Japan
6. Department of Gastroenterology; Ishikawa Prefectural Central Hospital; Kanazawa Japan
7. Department of Medicine and Bioregulatory Science; Graduate School of Medical Sciences; Fukuoka Japan
8. Division of Gastroenterology; Cancer Institute Hospital; Tokyo Japan
9. Endoscopy Division, Department of Gastroenterology; National Cancer Center Hospital East; Kashiwa Japan
10. Department of Gastroenterology; Kochi Red Cross Hospital; Kochi Japan
11. Department of Medicine, Faculty of Medicine; University of Malaya; Kuala Lumpur Malaysia
12. Division of Gastroenterology and Hepatology, Department of Internal Medicine; Chimei Medical Center; Tainan Taiwan