1. Department of Medicine Haukeland University Hospital Jonas Lies vei 65 5021 Bergen
2. Norway Department of Clinical Medicine University of Bergen Bergen Norway
3. Bergen Research Group for Advanced Gastrointestinal Endoscopy (BRAGE) Haukeland University Hospital Bergen Norway
4. Bergen Research Group for Advanced Gastrointestinal Endoscopy (BRAGE), Haukeland University Hospital, Bergen, Norway
5. Department of Pediatrics, Haukeland University Hospital, Bergen, Norway
6. Department of Medicine, Haukeland University Hospital, Bergen, Norway
7. Department of Clinical Medicine, University of Bergen, Bergen, Norway
8. National Centre for Ultrasound in Gastroenterology, Haukeland University Hospital, Bergen, Norway
9. Centre for Clinical Research, Haukeland University Hospital, Bergen, Norway