National Centre for Ultrasound in Gastroenterology;
Department of Medicine;
Haukeland University Hospital;
Bergen;
Norway Institute of Medicine;
University of Bergen;
Bergen;
Norway;
Institute of Medicine;
University of Bergen;
Bergen;
Norway Department of Medicine;
Aalesund Hospital;
Aalesund;
Norway;
Institute of Medicine;
University of Bergen;
Bergen;
Norway Centre for Visceral Biomechanics and Pain;
Aalborg Hospital;
SMI;
Aalborg University;
Aalborg;
Denmark;