1. Department of Women’s Health and Territorial Medicine, University La Sapienza, Rome, Italy;
2. Department of Pediatrics, University Federico II, Naples, Italy;
3. Neonatology Unit, Monaldi Hospital, Naples, Italy;
4. Department of Pediatrics, University La Sapienza, Rome, Italy;
5. Gastroenterology Unit, Cardarelli Hospital, Naples, Italy;
6. Neonatology Unit, Fatebenefratelli Hospital, Naples, Italy;
7. Neonatology Unit, Meyer Pediatric Hospital, Florence, Italy;
8. Neonatology Unit, V. Betania Evangelic Hospital, Naples, Italy
9. European Laboratory for the Investigation of Food Induced Diseases, Naples, Italy