1. Department of Medical Gastroenterology and Hepatology; Rigshospitalet; Copenhagen Denmark
2. Department of Gastroenterology; Zealand University Hospital; Køge Denmark
3. Department of Clinical Medicine; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
4. Centre for Clinical Research and Prevention; Frederiksberg and Bispebjerg Hospital; Copenhagen Denmark
5. Department of Epidemiology Research; Statens Serum Institute; Copenhagen Denmark