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