1. Department of Gastroenterology, Instituto Portugues de Oncologia, Porto, Portugal
2. Department of Digestive Diseases, Hôpital Edouard Herriot, Lyon, France
3. Department of Gastroenterology, Istituto Clinico Humanitas, Milan, Italy
4. Institute for Pathology, Klinikum Bayreuth, Bayreuth, Germany
5. Department of Gastroenterology, National Cancer Institute, Bari, Italy
6. Gastroenterology Unit, Ospedale Valduce, Como, Italy
7. University Clinic of Internal Medicine I, Salzburg, Austria
8. Department of Gastroenterology, Queen Alexandra Hospital, Portsmouth, UK
9. Pomeranian Medical University, Szczecin, Poland
10. Department Gastroenterology and Endoscopy, Ospedale di Sanremo, Sanremo, Italy
11. Erasmus Medical Center, Rotterdam, The Netherlands
12. Institute of Pathology, Medizinische Universität Graz, Graz, Austria
13. Bispebjerg Hospital, Copenhagen, Denmark
14. Department of Internal Medicine III, Klinikum Augsburg, Augsburg, Germany
15. Department of Surgery, University Hospital of Turin, Turin, Italy
16. Department of Internal Medicine, Evangelisches Krankenhaus Düsseldorf, Düsseldorf, Germany
17. Cliniques universitaires St-Luc, Université catholique de Louvain, Brussels, Belgium
18. Department of Pathology, Università di Padova, Padova, Italy
19. Wolfson Unit for Endoscopy, St. Mark’s Hospital & Imperial College, London, UK
20. Service d’hépato-gastroenterologie, Hôpital de la Cavale-Blanche, Brest, France
21. GastroZentrum, Klinik Hirslanden, Zurich, Switzerland
22. Endoscopy Department, Yaroslavl Regional Cancer Hospital, Yaroslavl, Russia
23. Gedyt Endoscopy Center, Buenos Aires, Argentina
24. Department of Gastroenterology, Nuovo Regina Margherita Hospital, Rome, Italy