1. Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Copenhagen Ø, Denmark;
2. Department of Surgical Gastroenterology and Transplantation, Copenhagen University Hospital Rigshospitalet, Copenhagen Ø, Denmark;
3. Department of Clinical Physiology, Center of Functional Imaging and Research, Faculty of Health Sciences, Hvidovre Hospital, Hvidovre, Denmark;
4. Faculty of Health and Medical Sciences, Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark;
5. Department of Clinical Physiology, Nuclear Medicine and PET, Copenhagen University Hospital, Rigshospitalet, Copenhagen Ø, Denmark;
6. Department of Medical Gastroenterology and Hepatology, Copenhagen University Hospital Rigshospitalet, Copenhagen Ø, Denmark