1. Department of Gastroenterology, CHU Dinant-Godinne, Avenue G. Therasse 1, 5530 Yvoir, Belgium
2. Gastroenterology Department, Centro Hospitalar São João, Porto, Portugal
3. Institute of Pharmacology and Therapeutics, Faculty of Medicine, University of Porto, Portugal
4. Institute for Molecular and Cell Biology, University of Porto, Porto, Portugal
5. Department of Infectious Diseases, Hospital São João, Porto, Portugal
6. IBD Unit, Complesso Integrato Columbus, Catholic University, Rome, Italy
7. Department of Gastroenterology, Sheba Medical Center, Tel-hashomer, 52961 Ramat-Gan, Israel
8. Department of Gastroenterology, Rambam Health Care Campus, Haalia, 31096 Haifa, Israel
9. Dipartimento Biomedico di Medicina Interna e Specialistica, University of Palermo, Italy
10. Pediatric gastroenterologist, Sophia Children's Hospital, 3000 CB Rotterdam, The Netherlands
11. Centre for Colorectal Disease, St. Vincent's University Hospital and School of Medicine and Medical Science, University College Dublin, Ireland
12. Gastroenterology Outpatient Clinic, 69121 Heidelberg, Germany
13. Hospital Universitari Mutua de Terrassa, University of Barcelona, Catalonia, Centro de Investigación Biomédica en Red en el Área Temática de Enfermedades Hepáticas y Digestivas, Spain
14. Division of Gastroenterology, University Hospital of Ioannina, Medical School of Ioannina, Greece
15. Gastrointestinal Unit, Western General Hospital, EH4 2XU Edinburgh, United Kingdom
16. Department of Infectious Diseases, Guy's & St. Thomas' NHS, Foundation Trust, London SE1 7EH, United Kingdom
17. Department of Gastroenterology, Antwerp University Hospital, 2650 Edegem, Belgium
18. Division Internal Medicine III, Dept. Gastroenterology and Hepatology Medical University Vienna, A-1090 Vienna, Austria
19. Department of Internal Medicine, McMaster University, Ontario, Canada
20. Department of Internal Medicine I, Division of Gastroenterology, Endocrinology and Metabolism, Medical University Innsbruck, Austria
21. Department of Pharmacy, Centre Hospitalier de l'Université de Montréal, H2X 3J4 Montreal, Canada
22. Pediatric Gastroenterology and Nutrition UZBrussels, Free University Brussels, Belgium
23. Service Universitaire des Maladies infectieuses et du voyageur Centre hospitalier de Tourcoing, 59208 Tourcoing cedex, France
24. Service des Maladies Infectieuses et tropicales, Hopital Bichat Claude Bernard, 75877 Paris, France
25. Department of Gastroenterology and Hepatology, Sheba Medical Center, 52621 Tel Hashomer, Israel
26. Henry D. Janowitz Division of Gastroenterology, Icahn Medical School at Mount Sinai, New York 10029, USA