1. Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
2. Respiratory Medicine, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
3. Department of Pulmonology, Hospital Universitari Vall d’Hebron, Barcelona, Spain
4. CIBER of Respiratory Diseases (CIBERes), Madrid, Spain
5. Cell Biology, Physiology, and Immunology, Universidad Autónoma de Barcelona, Barcelona, Spain
6. GlaxoSmithKline, Madrid, Spain
7. GlaxoSmithKline, Collegeville, PA, USA
8. Pharmerit International, Rotterdam, the Netherlands
9. Medicine and Specialities Department, Universidad de Alcalá (Alcalá de Henares, Madrid), Hospital Universitario Guadalajara, Guadalajara, Spain