1. Department of Molecular Oncology Institute for Cancer Research Oslo University Hospital–Norwegian Radium Hospital Oslo Norway
2. K. G. Jebsen Colorectal Cancer Research Centre Oslo University Hospital Oslo Norway
3. Norwegian PSC Research Center, Department of Transplantation Medicine Oslo University Hospital Oslo Norway
4. Institute of Clinical Medicine University of Oslo Oslo Norway
5. Department of Medicine Huddinge Unit of Gastroenterology and Rheumatology Karolinska Institutet Karolinska University Hospital Stockholm Sweden
6. Section of Gastroenterology Department of Transplantation Medicine Division of Surgery, Inflammatory Medicine and Transplantation Oslo University Hospital–Rikshospitalet Oslo Norway
7. Department of Medicine Division of Gastroenterology Helsinki University Hospital and Helsinki University Helsinki Finland