1. Division of Pneumology and Respiratory Physiopathology, A. Cardarelli Hospital, 80131 Naples, Italy
2. Istituti Clinici Scientifici Maugeri IRCCS, Pulmonary Rehabilitation Unit of Telese Terme Institute, 82037 Telese Terme, Italy
3. Department of Clinical Medicine and Surgery, University of Naples “Federico II”, 80131 Naples, Italy
4. Department of Radiology, Monaldi Hospital, Azienda Ospedaliera dei Colli, 80131 Naples, Italy
5. Istituti Clinici Scientifici Maugeri IRCCS, Pulmonary Rehabilitation Unit of Lumezzane Institute, 25065 Lumezzane, Italy
6. Istituti Clinici Scientifici Maugeri IRCCS, Scientific Directorate of Telese Terme Institute, 82037 Telese Terme, Italy