1. Department of Gastrointestinal Oncology; Osaka Medical Center for Cancer and Cardiovascular Diseases; Osaka Japan
2. Department of Gastroenterology; Cancer Institute Hospital of Japanese Foundation for Cancer Research; Tokyo Japan
3. Endoscopy Division; National Cancer Center Hospital; Tokyo Japan
4. Department of Gastroenterology; Nagaoka Red Cross Hospital; Niigata Japan
5. Division of Gastroenterology; Tohoku University Graduate School of Medicine; Sendai Japan
6. Endoscopy Division; National Cancer Center Hospital East; Kashiwa Japan
7. Center for Endoscopy; Teine Keijinkai Hospital; Sapporo Japan
8. Division of Research and Development for Minimally Invasive Treatment; Cancer Center; Keio University School of Medicine; Tokyo Japan
9. Department of Endoscopy; Saku Central Hospital Advanced Care Center; Saku Japan
10. Division of Esophageal and Upper Gastrointestinal Surgery; The University of Hong Kong; Queen Mary Hospital; Hong Kong
11. School of Medical Sciences; Universiti Sains Malaysia; Kota Bharu Kelantan Malaysia
12. Department of Pediatrics; Shinshu University School of Medicine; Matsumoto Japan
13. Department of Surgical Pathology; Sapporo Kosei General Hospital; Sapporo Japan
14. Division of Gastroenterology and Hepatology; Department of Medicine; Nihon University School of Medicine; Tokyo Japan