1. Section for Colorectal Cancer Screening Cancer Registry of Norway Oslo Norway
2. Department of Transplantation Medicine Division of Surgery, Inflammatory Diseases and Transplantation Oslo University Hospital Rikshospitalet Oslo Norway
3. Departments of Epidemiology Harvard T.H. Chan School of Public Health Boston Massachusetts USA
4. Department of General Visceral and Transplantation Surgery Heidelberg University Hospital Heidelberg Germany
5. Departments of Epidemiology and Nutrition Harvard T.H. Chan School of Public Health Boston Massachusetts USA
6. Clinical and Translational Epidemiology Unit Massachusetts General Hospital and Harvard Medical School Boston Massachusetts USA
7. Division of Gastroenterology Massachusetts General Hospital and Harvard Medical School Boston Massachusetts USA