1. Amsterdam UMC, University of Amsterdam, Emma Children's Hospital, Department of Pediatric Gastroenterology, Hepatology and Nutrition, Amsterdam, The Netherlands
2. Amsterdam Reproduction and Development, Amsterdam, The Netherlands
3. Amsterdam Gastroenterology and Metabolism, Amsterdam, The Netherlands
4. Amsterdam UMC, Vrije Universiteit, Amsterdam, The Netherlands
5. Department of Pediatric Surgery, University Medical Centre Mannheim, Medical Faculty Mannheim, University of Heidelberg, Germany
6. Department of Pediatric Surgery, The New Children's Hospital, University of Helsinki, Helsinki, Finland
7. Erasmus MC, Sophia's children's Hospital, department of Pediatric Surgery, Rotterdam, The Netherlands
8. Department of Paediatric Gastroenterology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
9. Pediatric Surgical Centre, Emma Children's Hospital, Amsterdam UMC, University of Amsterdam, Vrije Universiteit, Amsterdam, The Netherlands