1. Department of Clinical Medicine University of Bergen Bergen Norway
2. Pediatric Department Haukeland University Hospital Bergen Norway
3. Department of Medicine Haukeland University Hospital Bergen Norway
4. Department of Gastroenterology and Hepatology Centre of Pancreatic Diseases Aalborg University Hospital Aalborg Denmark
5. Department of Gastroenterology Bispebjerg University Hospital Copenhagen Denmark
6. Department of Gastroenterology Herlev University Hospital Herlev Denmark
7. Department of Gastroenterology Hvidovre University Hospital Herlev Denmark
8. Department of Gastrointestinal Surgery Lithuanian University of Health Sciences Kaunas Lithuania
9. Department of Upper Abdominal Diseases Karolinska University Hospital Stockholm Sweden
10. Department of Medicine Huddinge Karolinska Institute Stockholm Sweden
11. Department of Gastroenterology Karolinska University Hospital Stockholm Sweden
12. Department of Gastroenterology and Alimentary Tract Surgery Tampere, University Hospital Tampere Finland