1. Allergy Unit, Meyer Children’s Hospital IRCCS, 50139 Florence, Italy
2. Department of Health Sciences, University of Florence, 50139 Florence, Italy
3. Pediatric Department, Latisana-Palmanova Hospital, Azienda Sanitaria Universitaria Friuli Centrale, 33100 Udine, Italy
4. Translational Research in Pediatric Specialties Area, Division of Allergy, Bambino Gesù Children’s Hospital IRCCS, 00165 Rome, Italy
5. Pediatric Clinic, Fondazione IRCCS Policlinico San Matteo, University of Pavia, 27100 Pavia, Italy
6. Pediatric Unit, University Hospital Renato Dulbecco, 88100 Catanzaro, Italy
7. Pediatric Unit, Bufalini Hospital, AUSL Romagna, 47521 Cesena, Italy
8. Pediatric Clinic, Medicine and Surgery Department, Azienda Ospedaliero-Universitaria, University of Parma, 43126 Parma, Italy