1. NESMOS Department Faculty of Medicine and Psychology Sant'Andrea University Hospital Sapienza University of Rome Rome Italy
2. Department of Medical and Surgical Sciences University of Bologna Bologna Italy
3. Department of Translational Medical Science "Federico II" University of Naples Naples Italy
4. Division of Neurogastroenterology and Motility Department of Paediatric Gastroenterology UCL Institute of Child Health and Great Ormond Street Hospital London UK
5. Department of Woman, Child and General and Specialistic Surgery University of Campania "Luigi Vanvitelli" Naples Italy
6. Pediatric Gastroenterology Unit Department of Human Pathology in Adulthood and Childhood "G. Barresi" University of Messina Messina Italy
7. Pediatric Department Santa Maria Goretti Hospital Sapienza University of Rome Latina Italy
8. Pediatric Department Ospedale "F. Del Ponte" University of Insubria Varese Italy
9. Pediatric Emergency Unit Santobono‐Pausilipon Children's Hospital Naples Italy
10. Pediatric and Pediatric Emergency Unit "Umberto Bosio" Center for Digestive Diseases The Children Hospital AO SS Antonio e Biagio e Cesare Arrigo Alessandria Italy
11. Department of Medical and Surgical Sciences Pediatric Unit University "Magna Graecia" of Catanzaro Catanzaro Italy
12. Pediatric Section Department of Interdisciplinary Medicine University of Bari “Aldo Moro” Bari Italy
13. Department of Pediatrics A.O.R.N. Santobono‐Pausilipon Naples Italy
14. Neonatology and Neonatal Intensive Care Unit Department of Biomedical Science and Human Oncology University of Bari "Aldo Moro" Bari Italy
15. Department of Pediatrics Catholic University Rome Italy
16. Digestive Endoscopy and Surgery Unit Bambino Gesù Children's Hospital IRCCS Rome Italy