1. Gastroenterology Department, Hospital da Senhora da Oliveira, Guimarães, Portugal
2. Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho-Braga. Portugal
3. ICVS/3B’s, PT Government Associate Laboratory – Braga/Guimarães, Portugal.
4. Department of Gastroenterology, Sheba Medical Center, Sackler School of Medicine, Tel-Aviv, Israel
5. Division of Gastroenterology, Mater Dei Hospital, Msida, Malta
6. Department of Internal Medicine, Gastroenterology & Digestive Endoscopy, Hospital of Busto Arsizio, Italy
7. Hospices Civils de Lyon, Hôpital Edouard Herriot, Service d'Hépato-Gastro-Entérologie et d'Endoscopie Digestive, Lyon, France
8. Gastroenterology & Endoscopy Unit, University Hospital of Parma, University of Parma, Parma, Italy
9. Unit of Gastroenterology and Endoscopy, Fondazione IRCCS Cà Granda, Ospedale Policlinico di Milano, Milan, Italy
10. Department of Clinical Research, University of Southern Denmark, Odense, Denmark
11. Clinic for Internal Medicine, Bethesda Krankenhaus Bergedorf, Hamburg, Germany
12. Skåne University Hospital, Lund University, Malmö, Sweden
13. Endoscopy Unit, The Royal Infirmary of Edinburgh, Scotland, UK
14. Department of Social Medicine & Public Health, Pomeranian Medical University, Szczecin, Poland