[1] Azienda Ospedaliera Colli, Monaldi Hosp, Unit Bronchol, Naples, Italy
[2] Univ Naples Federico II, Dept Clin Med & Surg, Resp Med Div, Naples, Italy
[3] Azienda Ospedaliera Colli, Monaldi Hosp, Unit Pathophysiol & Resp Rehabil, Naples, Italy
[4] Polydiagnost Ctr Vega srl, Dept Diagnost Imaging, Naples, Italy
[5] Azienda Ospedaliera Colli, Monaldi Hosp, Dept Diagnost Imaging, Naples, Italy
[6] Azienda Ospedaliera Colli, Monaldi Hosp, Unit Bronchol, Via Leonardo Bianchi, I-80131 Naples, Italy