[1] Univ Autonoma Barcelona, Hosp Univ Vall Hebron, Dept Med, Pulmonol Serv, E-08193 Barcelona, Spain
[2] Ctr Invest Red Enfermedades Resp CIBERES, Inst Salud Carlos III, Madrid, Spain
[3] Univ Autonoma Barcelona, Dept Cell Biol Physiol & Immunol, E-08193 Barcelona, Spain
[4] Osakidetza Univ Basque Country,Spain, Hosp Univ Basurto, Dept Pneumol, Bilbao, Spain
[5] Univ Seville, Hosp Univ Virgen Rocio, Inst Biomed Sevilla IBIS, Unidad Medicoquirurg Enfermedades Resp, Seville, Spain
[6] Univ Pompeu Fabra, Inst Hosp Mar Invest Mediques IMIM, Muscle Res & Resp Syst Unit URMAR,Hosp Mar, Dept Expt & Hlth Sci CEXS,Dept Pulmonol,PRBB, Barcelona, Spain