1. Department of Internal Medicine, University Hospital San Martino, Genoa, Italy
2. Allergy/Pulmonary Rehabilitation, ICP, Milan, Italy
3. Stallergenes, Milan, Italy
4. Stallergenes, Milan, Italy; and Department of Medical and Surgical Specialties and Public Health, University Hospital, Perugia, Italy
5. Department of Biomedicine, AOUC, University of Florence, Italy, [on behalf of the SAT study group]