1. Department of Clinical and Experimental Medicine University of Catania Catania Italy
2. Department of Pediatrics, Allergology and Immunology Division Sapienza University Rome Italy
3. Department of Woman, Child and Specialized Surgery University of Campania “Luigi Vanvitelli” Naples Italy
4. Department of Pediatrics Giovanni XXIII Hospital University of Bari Bari Italy
5. Primary care pediatrician Cedegolo, Brescia Italy
6. Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico di Milano Milan Italy