1. Department of Hepatology and Gastroenterology Aarhus University Hospital Aarhus Denmark
2. Department of Clinical Medicine Aarhus University Aarhus Denmark
3. Department of Clinical Medicine Center for Molecular Prediction of Inflammatory Bowel Disease Aalborg University Copenhagen Denmark
4. Department of Clinical Epidemiology Aarhus University Hospital Aarhus Denmark
5. Department of Obstetrics and Gynaecology Aarhus University Hospital Aarhus Denmark
6. Center for Crohn's and Colitis Brigham and Women's Hospital, Harvard Medical School Massachusetts Boston USA