1. Section for Colorectal Cancer Screening, Cancer Registry of Norway, Oslo, Norway
2. Institute of Clinical Medicine, University of Oslo, Oslo, Norway
3. Department of Medicine, Vestre Viken Hospital Trust Baerum, Gjettum, Norway
4. Department of Research, Cancer Registry of Norway, Oslo, Norway
5. Department of Research and Development, Telemark Hospital Trust, Skien, Norway
6. Institute of Health and Society, University of Oslo, Oslo, Norway
7. Department of Medicine, Sørlandet Hospital Trust, Kristiansand, Norway
8. Clinical Effectiveness Research Group, Institute of Health and Society, University of Oslo, Oslo, Norway
9. Department of Transplantation Medicine, Oslo University Hospital, Oslo, Norway
10. Department of Medicine, Østfold Hospital Trust, Grålum, Norway
11. Department of Medicine, Lovisenberg Diaconal Hospital, Oslo, Norway
12. Department of Gastroenterology, Østfold Hospital Trust, Grålum, Norway
13. Department of Medical Research, Vestre Viken Hospital Trust Baerum, Gjettum, Norway
14. Department of Medicine, Sahlgrenska University Hospital-Mölndal, Mølndal, Sweden
15. Department of Molecular and Clinical Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden