1. Clinical Effectiveness Research Group, University of Oslo and Department of Transplantation Medicine, Oslo University Hospital, Oslo, Norway
2. Digestive Disease Center, Showa University Northern Yokohama Hospital, Yokohama, Japan
3. Medical University Vienna, Vienna, Austria
4. Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland
5. Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
6. Gastroenterology and Endoscopy Unit, Edouard Herriot Hospital, Hospices Civils de Lyon, Lyon, France
7. Department of Gastroenterology, University Hospital Augsburg, Augsburg, Germany
8. Ellen and Pinchas Mamber Institute of Gastroenterology and Hepatology, Emek Medical Center, Afula, Israel
9. Rappaport Faculty of Medicine Technion Israel Institute of Technology, Haifa, Israel
10. Department of Gastroenterology and Hepatology, University Hospitals Leuven, and TARGID, KU Leuven, Leuven, Belgium
11. Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
12. Endoscopy Unit, Humanitas Clinical and Research Center – IRCCS, Rozzano, Italy