1. Department of Pediatrics, San Carlo Hospital - ASST Santi Paolo e Carlo , Milano , Italy
2. FROM Research foundation, ASST Papa Giovanni XXIII , Bergamo , Italy
3. Pediatric Gastroenterology and Liver Unit, Department of Maternal and Child Health, Sapienza University of Rome , Roma , Italy
4. Pediatric Gastroenterology Unit, Maggiore Hospital, Bologna , Italy
5. Pediatric Clinic, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, Pediatric Division, University of Verona , Verona , Italy
6. Department of Women’s and Children’s Health, University of Padova , Padova , Italy
7. Institute for Maternal and Child Health “IRCCS Burlo Garofolo” , Trieste , Italy
8. Pediatrics, Department of Medical and Surgical Sciences, University of Foggia , Italy
9. Pediatric Hepatology, Gastroenterology and Transplantation Unit, ASST Papa Giovanni XXIII , Bergamo , Italy
10. Gastroenterology and Nutrition Unit, Meyer children’s Hospital, Department Neurofarba, University of Florence , Florence , Italy
11. Pediatric and Pediatric Emergency Unit, “U. Bosio” Center for Pediatric Digestive Diseases, Children Hospital, AO SS Antonio e Biagio e C. Arrigo , Alessandria , Italy
12. Department of Translational Medical Science, Section of Pediatrics, University of Naples “Federico II” , Napoli , Italy
13. Department of Pediatrics, Polytechnic University of Marche, G. Salesi Children’s Hospital , Ancona , Italy
14. Pediatric Unit, Villa Sofia Cervello Hospital , Palermo-Italy , Italy
15. Division of Pediatrics, “IRCCS Casa Sollievo della Sofferenza” , San GiovanniRotondo , Italy
16. Pediatric Department, University of Milano Bicocca, Fondazione MBBM, Onlus San Gerardo Hospital , Monza , Italy