[1] Hosp Clin, Dept Pneumol, Santiago De Compostela, Galicia, Spain
[2] Hosp Clin, Dept Internal Med, Santiago De Compostela, Galicia, Spain
[3] Univ Santiago de Compostela, Ctr Network Epidemiol & Publ Hlth CIBERESP, Dept Prevent Med, Galicia, Spain
[4] AstraZeneca Farmaceut Spain SA, Dept Med, Madrid, Spain