1. Asthma Center & Allergy Unit, Verona University & General Hospital, Verona, Italy
2. Department of Medicine, Allergy and Clinical Immunology School, University of Verona, Verona, Italy
3. Department of Computer Science, University of Verona, Verona, Italy
4. Allergy Outpatient Clinic, Treviglio Hospital, Treviglio, Bergamo, Italy
5. Allergy service, Department of Environmental Medicine & Public Health, Padua University & General Hospital, Padua, Italy
6. Department of Medical Science, University of Torino, Italy
7. Allergy & Clinical Immunology Uni, A.O. Ordine Mauriziano, Torino, Italy
8. Allergy & Clinical Immunology Unit, Azienda Usl Toscana Centro, Ospedale San Giovanni di Dio, Firenze, Italy