Affiliation: | 1. Pulmonology Service, Medicine Department, Hospital Vall d'Hebron, Universitat Autònoma de Barcelona, , Barcelona, Spain;2. CIBER Enfermedades Respiratorias (Ciberes), , Barcelona, Spain;3. Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, , Barcelona, Spain;4. Biostatistics and Epidemiology Laboratory, Universitat Autònoma de Barcelona, , Barcelona, Spain |