1. Department of Gastroenterology and Gastrointestinal Endoscopy San Raffaele Hospital IRCSS Milan Italy
2. Department of Gastrointestinal Endoscopy Westmead Hospital Sydney NSW Australia
3. Department of Gastroenterology and Hepatology Gunma University Graduate School of Medicine Gumma Japan
4. NIHR Nottingham Biomedical Research Centre Nottingham University Hospitals NHS Trust and the University of Nottingham Nottingham UK
5. Digestive Disease Center Showa University Northern Yokohama Hospital Kanagawa Japan
6. Endoscopy Division National Cancer Center Hospital Tokyo Japan
7. Department of Gastroenterology University College Cork Cork Ireland