1. Department of Pediatrics, A.O.R.N. Santobono-Pausilipon, Naples, Italy
2. Maternal and Child Health Department, Sapienza - University of Rome, Santa Maria Goretti Hospital, Polo Pontino, Latina, Italy
3. Pediatric Emergency Unit, Santobono-Pausilipon Children's Hospital, Naples, Italy
4. Chair of Pediatrics, Pediatric Gastroenterology and Endoscopy Unit, NESMOS Department, Faculty School of Medicine and Psychology, Sapienza University of Rome, Sant’Andrea University Hospital, Rome, Italy