1. Department Internal Medicine III; Medical University of Vienna; Vienna Austria
2. Department of Gastroenterology; Rambam Health Care Campus; Haifa Israel
3. Department of Gastroenterology; Humanitas Clinical and Research Center; Milan Italy
4. Department of Gastroenterology; Oncology, Infectious Diseases and Metabolism; Agaplesion Markus Hospital; Frankfurt Germany
5. Department of Gastroenterology; Hospital Clínico Universitario Lozano Blesa; CIBEREHD; Zaragoza Spain
6. Department of Gastroenterology; Herlev Hospital; University of Copenhagen; Copenhagen Denmark
7. 1 Department of Medicine; Semmelweis University; Budapest Hungary
8. Department of Gastroenterology; Western General Hospital; Edinburgh UK
9. Department of Gastroenterology; University Hospital Skane; University of Lund; Malmö Sweden
10. IBD Clinical and Research Centre; ISCARE Lighthouse and 1 Medical Faculty; Charles University; Prague Czech Republic
11. 1 Department of Gastroenterology; Evangelismos Hospital; Athens Greece
12. Department of Gastroenterology; Lausanne University Medical Center; Lausanne Switzerland
13. Department of Gastroenterology; Oslo University Hospital; University of Oslo; Oslo Norway
14. Inserm, U954 and Department of Hepato-Gastroenterology; University Hospital of Nancy; Université Henri Poincaré 1; Vandoeuvre-lès-Nancy France
15. Department of Gastroenterology; Ankara University School of Medicine; Ankara Turkey
16. Department of Gastroenterology and Hepatology; Erasmus University Medical Center; Rotterdam The Netherlands
17. Department of Internal Medicine, Clinical Immunology and Infectious Diseases; Medical University of Innsbruck; Innsbruck Austria
18. Center for Decision Analysis and Support; Ismar Healthcare; Lier Belgium