1. Pediatrics Unit, NESMOS Department, Faculty of Medicine and Psychology Sapienza University, S. Andrea Hospital Rome Italy
2. Department of Specialized Clinical Sciences and Odontostomatology Polytechnic University of Marche Ancona Italy
3. Digestive Endoscopy and Surgery Unit Bambino Gesù Children's Hospital IRCCS Rome Italy
4. Department of Translational Medical Science University of Naples Federico II Napoli Italy
5. Gastroenterology and Nutrition Unit University of Florence‐Meyer Hospital Florence Italy
6. Pediatric Gastroenterology and Cystic Fibrosis Unit University of Messina Messina Italy