1. Department of Clinical and Molecular Sciences, Università Politecnica delle Marche, Italy
2. Allergy Unit, Department of Internal Medicine, University Hospital Ospedali Riuniti di Ancona, Italy
3. Division of Pulmonary Disease, Istituti Clinici Scientifici Maugeri Spa SB, Pavia, and IRCCS of Bari, Bari, Italy
4. Pneumology I and Respiratory Pathophysiology Unit, A. Cardarelli Hospital, Naples, Italy
5. Pneumology Unit, Department of Medical Specialties, Arcispedale Santa Maria Nuova, Azienda USL di Reggio Emilia- IRCCS, Reggio Emilia, Italy
6. Department of Allergology, Casa della Salute di Scilla, Scilla, Reggio Calabria, Italy
7. Respiratory Unit, Mater Salutis Hospital, AULSS 9 Scaligera, Legnago, Verona, Italy
8. Respiratory Unit, ASST-Rhodense, Garbagnate Milanese, Milan, Italy
9. Pulmonary Unit, Integrated University Hospital of Verona, Verona, Italy