1. Otorhinolaryngology Unit, Casa di Cura Villa Montallegro, Genoa, Italy
2. Pediatric Allergy Center, Istituto G. Gaslini, Genoa, Italy
3. Pediatrics Clinic, Department of Pediatrics, Ospedale San Matteo, University of Pavia, Pavia, Italy
4. Health Sciences Department, Genoa University, Genoa, Italy
5. Allergy Clinic, Casa di Cura Villa Montallegro, Genoa, Italy