1. Department of Translational Medical Sciences – Section of Pediatrics, University of Naples Federico II, Naples, Italy
2. Department of Pediatrics, Ospedale “F. Del Ponte”, University of Insubria, Varese, Italy
3. Pediatric Gastroenterology and Cystic Fibrosis Unit, Department of Human Pathology in Adulthood and Childhood “G. Barresi”, University of Messina, Messina, Italy
4. Department of Public Health, University of Naples Federico II, Naples, Italy
5. Primary Care Pediatrician ASP6, Residency School of Pediatrics, University of Palermo, Palermo, Italy
6. Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Pediatric Gastroenterology, Hepatology and Nutrition, Amsterdam, The Netherlands.