1. Department of Endoscopy, Kobe University Hospital, Kobe, Japan
2. Division of Upper Gastrointestinal Tract, Department of Surgery, Fujita Health University, Aichi, Japan
3. Translational Gastroenterology Unit, John Radcliffe Hospital, Oxford, United Kingdom
4. Department of Gastroenterology, Kishiwada Tokushukai Hospital, Kishiwada, Japan
5. Department of Pathology, Kishiwada Tokushukai Hospital, Kishiwada, Japan
6. Division of Gastroenterology, Department of Internal Medicine, Graduate School of Medicine, Kobe University, Kobe, Japan