1. Department of Gastroenterology, North Zealand University Hospital, Capital Region, Denmark
2. Omicron Aps, Department of Statistics, Roskilde, Denmark
3. Diagnostic center, Silkeborg Hospital, Silkeborg, Denmark
4. Department of Gastroenterology and Hepatology, Linköping University Hospital, Linköping, Sweden
5. Department of Health, Medicine, and Caring Sciences, Linköping University, Linköping, Sweden
6. Department of Obstetrics and Gynaecology, North Zealand University Hospital, Capital Region, Denmark