1. Department of Biomedicine, Unit of Pharmacology and Therapeutics , University of Porto, Porto , Portugal
2. Department of Gastroenterology and Hepatology, University Hospitals , KU Leuven, Leuven , Belgium
3. Pathology Unit, IRRCCS, S. Orsola-Malpighi University Hospital , Bologna , Italy
4. Department of Histopathology, Cambridge University Hospitals NHS Foundation Trust , Cambridge , UK
5. Department of Pathology, Hospital Cuf Descobertas, Lisboa and Faculdade de Medicina da Universidade de Lisboa , Lisbon , Portugal
6. Department of Pathology, Cliniques Universitaires St-Luc, Université Catholique de Louvain , Brussels , Belgium
7. Gastroenterology and Endoscopy, IRCCS Ospedale San Raffaele and University Vita-Salute San Raffaele , Milano , Italy
8. Department of Pathology, University Hospital Antwerp, University of Antwerp , Edegem , Belgium
9. Department of Pathology, Robert J. Tomsich Pathology and Laboratory Medicine Institute, Cleveland Clinic Foundation , Cleveland, OH , USA
10. Institute of Translational Medicine, Institute of Immunology and Immunotherapy, NIHR Birmingham Biomedical Research Centre, University of Birmingham , Birmingham , UK
11. Department of Gastroenterology, Addenbrooke’s Hospital, Cambridge University Hospitals NHS Trust , Cambridge , UK
12. Sorbonne Université, AP-HP, Hôpital Saint-Antoine, Department of Pathology , Paris , France
13. Department of Gastroenterology, Nancy University Hospital , Vandoeuvre-Les-Nancy , France
14. Department of Cellular Pathology, Royal Free Hospital , London , UK