1. Department of Surgical Gastroenterology Hospital of South West Jutland Esbjerg Denmark
2. Department of Regional Health Research University of Southern Denmark Odense Denmark
3. OPEN, Open Patient Data Explorative Network Odense University Hospital Odense Denmark
4. Research Unit for Surgery Odense University Hospital Odense Denmark
5. University of Southern Denmark Odense Denmark
6. Department of Medical Gastroenterology Hospital of South West Jutland Esbjerg Denmark