1. Department of Cardiac-Thoracic-Vascular Sciences and Public Health, Respiratory Pathophysiology Division, University of Padova, Padova, Italy
2. Department of Statistical Sciences, University of Padova, Padova, Italy
3. Allergy & Respiratory Diseases Department, Azienda Ospedaliera Universitaria IRCCS San Martino, Genoa, Italy
4. Department of Medicine, University of Verona and Verona University Hospital, Verona, Italy
5. Allergy Unit and Asthma Center, Verona University Hospital, Verona, Italy