[1] Hosp Univ La Fe, Serv Neumol, Valencia, Spain
[2] Univ Barcelona, Serv Pneumol, Inst Clin Torax, IDIBAPS, Ciberes Grs, Spain
[3] Hosp Valle De Hebron, Inst Recerca Vall dHebron UAB, Barcelona, Spain
[4] Hosp Cruces, Serv Neumol, Bilbao, Spain
[5] Hosp Galdakao, Serv Neumol, Galdakao, Spain
[6] Hosp Princesa, Serv Neumol, Madrid, Spain
[7] Hosp San Jorge, Serv Neumol, Huesca, Spain
[8] Hosp Carlos Haya, Serv Neumol, Malaga, Spain
[9] Hosp Miguel Servet, Serv Neumol, Zaragoza, Spain
[10] Hosp Valme, Serv Neumol, Seville, Spain
[11] Hosp Dr Negrin, Serv Neumol, Las Palmas Gran Canaria, Spain
[12] Univ Oviedo, Hosp Cent Asturias, Serv Neumol, E-33080 Oviedo, Spain
[13] Hosp Badalona Germans Trias & Pujol, Serv Neumol, Badalona, Spain