1. Department of Gastroenterology, North Zealand University Hospital, Capital Region, Denmark
2. Department of Statistics, Omicron Aps, Roskilde, Denmark
3. Diagnostic Center, Section of Gastroenterology, Silkeborg Hospital, Silkeborg, Denmark
4. Department of Gastroenterology and Hepatology, Linköping University Hospital, Linköping, Sweden
5. Department of Obstetrics and Gynaecology, North Zealand University Hospital, Capital Region, Denmark