1. National Centre for Ultrasound in Gastroenterology, Department of Medicine, Haukeland University Hospital;
2. Department of Clinical Medicine, University of Bergen;
3. Department of Pediatrics, Haukeland University Hospital, Bergen, Norway;
4. Department of Clinical Science, University of Bergen, Bergen, Norway;
5. Norwegian National Advisory Unit on Tropical Infectious Diseases, Department of Medicine, Haukeland University Hospital, Bergen, Norway;
6. Center for Medical Genetics and Molecular Medicine, Haukeland University Hospital, Bergen, Norway