[1] Univ Milan, Ca Granda Osped Maggiore Milano Fdn, Milan, Italy
[2] Univ Genua, Genoa, Italy
[3] Univ Milan, San Paolo Hosp, Milan, Italy
[4] Careggi Hosp, Florence, Italy
[5] SS Annunziata Hosp, Pneumol Unit, Chieti, Italy
[6] A Cardarelli Hosp, Pneumol & Resp Pathophysiol Unit 1, Naples, Italy
[7] Univ Catania, Pulmonol Unit, Sch Specializat Resp Dis, Catania, Italy
[8] Univ Catania, Dept Clin & Mol Biomed, Catania, Italy
[9] Mondo Med, Multidisciplinary & Rehabil Outpatient Clin, Borgomanero, NO, Italy
[10] Villalba & Villa Torri Hosp, GVM Care & Res, Dept Pneumol, I-40136 Bologna, Italy
[11] ASL 2, Dept Pneumol, Savona, SV, Italy
[12] ASL 2, Med Field Dept, Savona, SV, Italy
[13] Vittorio Veneto Gen Hosp ULS 7 Veneto Reg, Pulm & TB Unit, Vittorio Veneto, TV, Italy
[14] IRCCS S Raffaele, Rome, Italy
[15] ASL SA, North Salerno Lung Dis Pole, Salerno, Italy
[16] Univ & Gen Hosp Verona, Pneumol Unit, Verona, Italy
[17] San Filippo Neri Gen Hosp, Pneumol Unit UTIR, Rome, Italy