[1] Azienda Osped Univ Citta Salute & Sci, SC Pneumol, Turin, Italy
[2] Univ Turin, Dept Med Sci, Turin, Italy
[3] Univ Genoa, Dept Internal Med DiMI, Resp Unit Continu Care, IRCCS Osped Policlin San Martino, Genoa, Italy
[4] Univ Ferrara, Resp Sect, Dept Translat Med, Ferrara, Italy
[5] IRCCS Policlin San Matteo Fdn, Dept Med Sci & Infect Dis, Unit Resp Dis, Pavia, Italy
[6] Univ Pavia, Med Sch, Pavia, Italy
[7] Univ Milan, ASST Papa Giovanni XXIII, Dept Hlth Sci, Pneumol, Bergamo, Italy
[8] Univ Integrated Hosp, Cardiothorac Dept, Resp Unit, Verona, Italy
[9] Magna Graecia Univ Catanzaro, Dipartimento Sci Salute, Catanzaro, Italy
[10] Univ Roma Tor Vergata, Univ Hosp Tor Vergata, Div Resp Med, Unity Resp Med,Dept Expt Med, Rome, Italy
[11] Univ Sassari, Dept Med Surg & Expt Sci, Sassari, Italy
[12] Univ Palermo, Biomed Dept Internal & Specialist Med, Palermo, Italy
[13] AstraZeneca Italia, Basiglio, Italy
[14] Osped L Sacco, ASST Fatebenefratelli Sacco, Div Resp Dis, Milan, Italy
[15] Univ Milan, Dept Biomed & Clin Sci DIBIC, Milan, Italy