1. Pediatric Gastroenterology and Cystic Fibrosis Unit, Department of Human Pathology in Adulthood and Childhood “G.Barresi”, University of Messina, Messina, Italy
2. Division of Digestive Endoscopy, University of Messina, Messina, Italy
3. Pediatric Nutrition Team, Pediatric Unit of Santa Maria Nuova Hospital, Azienda Unit Sanitaria Locale di Reggio Emilia-IRCCS (AUSL-IRCCS), Reggio Emilia, Italy