1. Department of Surgical Gastroenterology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
2. Department of Pediatric Surgery, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
3. Section for Comparative Pediatrics and Nutrition, IVH, University of Copenhagen, Copenhagen, Denmark.
4. Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
5. Department of Anesthesiology, The Juliane Marie Center, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
6. Section of Diagnostic Imaging, Department of Veterinary Clinical Sciences, University of Copenhagen, Copenhagen, Denmark.