1. Department of Gastroenterology and Hepatology, Medical Center for Postgraduate Education and the Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland
2. Institute of Health and Society, Dep. of Health Management and Health Economy, University of Oslo, Oslo, Norway
3. Dep. of Transplantation Medicine, Gastrointestinal Endoscopy Unit, Oslo, University Hospital, Oslo, Norway
4. Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, USA
5. Departments of Gastroenterology and Hepatology, and Internal Medicine, Erasmus Medical Centre, Rotterdam, The Netherlands
6. Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, USA
7. Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden
8. Department of Public Health, Erasmus Medical Centre, Rotterdam, The Netherlands
9. Department of Surgery, Landspitali University Hospital, Reykjavik, Iceland
10. Department of Surgical Sciences, Uppsala University Hospital, Uppsala, Sweden
11. Department of Gastroenterology and Hepatology Academic, Medical Centre, Amsterdam, The Netherlands
12. Department of Gastroenterology, Sørlandet Hospital, Kristiansand, Norway
13. Centre for Colorectal Cancer Screening, The Cancer Registry of Norway, Oslo University Hospital, Oslo, Norway