1. Institute of Clinical Medicine, University of Aarhus, Aarhus, Denmark
2. Department of Pediatrics (Neurogastroenterology Unit), Aarhus University Hospital, Skejby, Denmark
3. Department of Hepatology and Gastroenterology V, Aarhus University Hospital, Skejby, Denmark
4. Department of Surgery P, Aarhus University Hospital, Skejby, Denmark