1. Department of Endoscopy; The Jikei University School of Medicine; Tokyo; Japan
2. Gastroenterology Unit; Division of Medicine; Lyell McEwin Hospital; Adelaide; South Australia; Australia
3. Endoscopy Division; National Cancer Center Hospital; Tokyo; Japan
4. Department of Gastroenterology; Cancer Institute Hospital; Japanese Foundation for Cancer Research; Tokyo; Japan
5. Department of Gastroenterology; Saku Central Hospital; Nagano; Japan
6. Division of Gastroenterology; Tohoku University Graduate School of Medicine; Sendai; Japan
7. Department of Gastrointestinal Oncology; Osaka Medical Center for Cancer and Cardiovascular Diseases; Osaka; Japan
8. Department of Gastroenterology; Sendai City Medical Center; Sendai; Japan
9. Department of Endoscopy and Endoscopic Surgery; The University of Tokyo; Tokyo; Japan
10. Gastroenterological Center; Yokohama City University Medical Center; Yokohama; Japan
11. Department of Gastroenterology; Kobe University; Kobe; Japan
12. Department of Gastroenterology & Hepatology; National University Hospital; Singapore
13. Division of Molecular and Diagnostic Pathology; Niigata University; Niigata; Japan