1. Norwegian PSC Research Center; Division of Surgery, Inflammatory Medicine and Transplantation; Oslo University Hospital, Rikshospitalet; Oslo Norway
2. National Centre for Ultrasound in Gastroenterology; Haukeland University Hospital; Bergen Norway
3. K.G. Jebsen Inflammation Research Centre; Institute of Clinical Medicine; University of Oslo; Oslo Norway
4. Research Institute of Internal Medicine; Division of Surgery, Inflammatory Medicine and Transplantation; Oslo University Hospital, Rikshospitalet; Oslo Norway
5. Section of Gastroenterology; Department of Transplantation Medicine; , Division of Surgery, Inflammatory Medicine and Transplantation; Oslo University Hospital; Rikshospitalet Oslo Norway