1. Research Unit for Surgery and Centre for IBD Care, Odense University Hospital, Odense, Denmark
2. University of Southern Denmark, Odense, Denmark
3. Department of Surgery, Aarhus University Hospital, Aarhus, Denmark
4. Center for Clinical Epidemiology and Research Unit of Clinical Epidemiology, Odense University Hospital, Odense, Denmark
5. Department of Clinical Research, University of Southern Denmark, Odense, Denmark
6. Division of Gastroenterology and Hepatology, The Mayo Clinic, Rochester, MN, USA
7. Department of Pediatrics, Odense University Hospital, Odense, Denmark
8. The Danish Clinical Quality Program and Clinical Registries (RKKP), Aarhus, Denmark
9. Department of Medical Gastroenterology, Odense University Hospital, Odense, Denmark
10. Research Unit of Medical Gastroenterology, Department of Clinical Research, University of Southern Denmark, Denmark