1. Department of Hepato-Pancreato-Biliary Surgery, Oslo University Hospital, Oslo, Norway
2. Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
3. Department of Surgery, University of Kentucky, Lexington, Kentucky, USA
4. Department of Oncology, National Resource Center for Late Effects, Oslo University Hospital, Oslo, Norway
5. Intervention Centre, Rikshospitalet, Oslo University Hospital, Oslo, Norway
6. Institute of Clinical Medicine, University of Oslo, Oslo, Norway
7. Department of Genetics, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway
8. Department of Pathology, Oslo University Hospital, Oslo, Norway
9. Department of Oncology, Oslo University Hospital, Oslo, Norway