[1] Hosp Mar IMIM, Pulmonol Dept, Lung Canc & Muscle Res Grp, Parc Salut Mar, Barcelona, Spain
[2] Univ Autonoma Barcelona UAB, Dept Med, Barcelona, Spain
[3] Clin Fuensanta, Resp Dept, Madrid, Spain
[4] Univ Malaga, Resp Dept, Hosp Reg Univ Malaga, Inst Invest Biomed Malaga IBIMA, Malaga, Spain
[5] Hosp Univ La Princesa, Inst Invest Sanitaria, Resp Dept, Madrid, Spain
[6] Hosp Univ Cent Asturias, Resp Dept, Oviedo, Spain
[7] Hosp Ramon & Cajal, Resp Dept, Madrid, Spain
[8] Hosp Clin Barcelona, Resp Dept, Barcelona, Spain
[9] Inst Salud Carlos III ISCIII, Ctr Invest Red Enfermedades Resp CIBERES, Madrid, Spain
[10] Hosp Lucus Augusti, Resp Dept, Lugo, Spain
[11] Hosp Univ & Politecn La Fe, Resp Dept, Valencia, Spain
[12] Hosp La Paz, Resp Dept, Madrid, Spain
[13] Univ Complutense Madrid, Resp Dept, Hosp Clin San Carlos,Dept Med, Inst Invest Sanitaria Hosp Clin San Carlos IdISSC, Madrid, Spain
[14] Hosp Santa Creu & Sant Pau, Resp Dept, Barcelona, Spain
[15] Hosp Mar IMIM, Sci & Tech Dept, Barcelona, Spain
[16] Univ Pompeu Fabra UPF, Dept Hlth & Expt Sci CEXS, Barcelona, Spain