1. Digestive Disease Center, Bispebjerg University Hospital, Copenhagen, Denmark;
2. Research Centre for Prevention and Health, Centre for Health, Capital Region of Denmark, Copenhagen, Denmark;
3. Institute for Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark;
4. Clinical Research Centre, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark;
5. Department of Public Health, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark;
6. The Faculty of Medicine, Aalborg University, Aalborg, Denmark