1. Respiratory Department, Hospital Universitario y Politécnico La Fe, Valencia, Spain
2. Respiratory Department, Hospital Universitario Virgen del Rocio, Sevilla, Spain
3. Respiratory Department, Hospital Universitario Valme, Sevilla, Spain
4. Respiratory Department, Hospital Universitario Vall Hebrón, Barcelona, Spain
5. Respiratory Department, Hospital Universitario 12 de Octubre, Madrid, Spain
6. Respiratory Department, Consorcio Sanitario de Terrassa, Barcelona, Spain
7. Respiratory Department, Hospital Universitario San Pedro de Alcántara, Cáceres, Spain
8. Respiratory Department, Hospital Universitario Marqués de Valdecilla, Santander, Spain
9. Respiratory Department, Hospital de Villajoyosa, Alicante, Spain
10. Institut de Recerca Biomédica, IRB Lleida, Spain
11. Bio-Araba Research Institute, Vitoria, Spain12Clinical Research Unit, Hospital Universitario Araba, Vitoria, Spain
12. Respiratory Department, Hospital Universitario Ramón y Cajal, Madrid, Spain
13. Respiratory Department, Hospital Universitario Mutua de Terrassa, Barcelona, Spain
14. Respiratory Department, Hospital Universtario Xeral, Vigo, Spain
15. Respiratory Department, Hospital Costa del Sol, Málaga, Spain
16. Respiratory Department, Hospital Universitario Son Espases, Palma de Mallorca, Spain
17. Respiratory Department, Hospital Universitario La Paz, IdiPAZ, Madrid, Spain
18. Respiratory Department, Hospital Son Llatzer, Palma de Mallorca, Spain
19. Respiratory Department, Hospital de Igualada, Barcelona, Spain
20. Respiratory Department, Hospital Universitario de Las Palmas, Gran Canaria, Spain
21. Respiratory Department, Hospital del Mar, Barcelona, Spain
22. Respiratory Department, Hospital Clinic-IDIBAPS, Barcelona, Spain