1. Department of Radiology, Akershus University Hospital, Lørenskog, Norway
2. Institute of Clinical Medicine, University of Oslo, Oslo, Norway
3. Department of Gastroenterology, Akershus University Hospital, Lørenskog, Norway
4. Norwegian PSC Research Center and Research Institute of Internal Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway
5. EpiGen Institute, Akershus University Hospital, Lørenskog, Norway