1. Department of Health Management and Health Economy, University of Oslo, Oslo, Norway2Department of Transplantation Medicine and KG Jebsen Center for Colorectal Cancer Research, Oslo University Hospital, Oslo, Norway 3Department of Epidemiology, Harvard T.
2. Department of Health Management and Health Economy, University of Oslo, Oslo, Norway4Department of Gastroenterological Oncology, The Maria Sklodowska Curie Memorial Cancer Center and Institute of Oncology and Medical Center for Postgraduate Education, War
3. Department of Health Management and Health Economy, University of Oslo, Oslo, Norway2Department of Transplantation Medicine and KG Jebsen Center for Colorectal Cancer Research, Oslo University Hospital, Oslo, Norway
4. Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY
5. Department of Gastroenterological Oncology, The Maria Sklodowska Curie Memorial Cancer Center and Institute of Oncology and Medical Center for Postgraduate Education, Warsaw, Poland
6. Department of Gastroenterology and Hepatology, Erasmus Medical Centre, Rotterdam, the Netherlands
7. Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA7Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA8Division of Health Sciences and Technology, Harvard–Massachusetts Institute of Technology,
8. Frontier Science Scotland, Kincraig, UK
9. Department of Gastroenterology and Hepatology, Academic Medical Centre, Amsterdam, the Netherlands
10. Department of Transplantation Medicine and KG Jebsen Center for Colorectal Cancer Research, Oslo University Hospital, Oslo, Norway
11. Department of Medicine, Sørlandet Hospital, Arendal, Norway
12. Department of Surgery, The National University Hospital of Iceland, Reykjavik, Iceland
13. Department of Health Management and Health Economy, University of Oslo, Oslo, Norway13Department of Research and Development, Telemark Hospital, Skien, Norway