1. Department of Cellular Pathology, Royal Free Hospital, London, and University College London, UK
2. Department of Gastroenterology, Hospital Beatriz Ângelo, Loures, Portugal
3. Department of Pathology, Hospital Cuf Descobertas, Lisboa and Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal
4. Gastrounit, Medical Division, Hvidovre Hospital, University of Copenhagen, Denmark
5. Department of Gastroenterology, Hospital da Senhora da Oliveira, Guimarães, Portugal
6. School of Medicine, University of Minho, Braga/Guimarães, Portugal
7. ICVS/3B’s–PT Government Associate Laboratory, Braga/Guimarães, Portugal
8. Department of Paediatric Gastroenterology, Erasmus MC Sophia Children’s Hospital, University Medical Center Rotterdam, The Netherlands
9. Department of Pathology, University Hospital Antwerp, University Antwerp, Edegem, Belgium
10. Department of Gastroenterology, Ghent University Hospital, Ghent, Belgium
11. Department of Digestive System Medicine, Hospital General Universitario-Insitituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
12. Department of Medicine, Universidad Complutense, Madrid, Spain
13. Centro de Investigación Biomédica En Red de Enfermedades Hepáticas y Digestivas [CIBEREHD], Madrid, Spain
14. Department of Pathology, Amsterdam UMC, Amsterdam, The Netherlands
15. Department of Gastroenterology, Addenbrooke’s Hospital, Cambridge University Hospitals NHS Trust, Cambridge, UK
16. Department of Pathology, Sorbonne Université, AP-HP, Saint-Antoine Hospital, Paris, France
17. Department of Histopathology, Spedali Civili and University of Brescia, Brescia, Italy
18. Institute of Pathology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
19. Department of Histopathology, Cambridge Biomedical Campus, Addenbrooke’s Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK