1. Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
2. Department of General Internal Medicine, Ghent University Hospital, Ghent, Belgium
3. Department of Internal Medicine, Ghent University, Ghent, Belgium
4. vzw Stop Darmkanker, Antwerp, Belgium
5. Department of Public Health, Ghent University, Ghent, Belgium
6. Department of Gastroenterology and liver diseases, Ghent University Hospital, Ghent, Belgium