1. Division of Respiratory and Allergic Diseases, Department of Chest Diseases, High Speciality A. Cardarelli Hospital, 80122 Naples, Italy
2. Medical School of Specialization in Respiratory Diseases, University of Naples Federico II, 80131 Naples, Italy
3. Institute Desbrest of Epidemiology and Public Health, University of Montpellier and INSERM, 34000 Montpellier, France
4. Department of Allergic and Respiratory Diseases, Montpellier University Hospital, 34000 Montpellier, France
5. Allergy and Clinical Immunology Unit, San Giovanni di Dio Hospital, 50143 Florence, Italy
6. Department of Environmental Biology, Sapienza University of Rome, 00185 Rome, Italy
7. Centre of Bioclimatology, University of Florence, 50121 Florence, Italy
8. Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italian Workers’ Compensation Authority (INAIL), Monte Porzio Catone, 00078 Rome, Italy
9. First Division of Pneumology, High Speciality Hospital V. Monaldi, 80131 Naples, Italy