1. Respiratory Medicine Department Hospital Clínic de Barcelona, IDIBAPS University of Barcelona CIBERES Barcelona Spain
2. Respiratory Investigation Unit, Respiratory and Sleep Medicine Royal Prince Alfred Hospital Camperdown NSW Australia
3. Pulmonology Department, Hospital del Mar Institut Hospital del Mar d'Investigacions Mèdiques (IMIM) Universitat Pompeu Fabra (UPF) CIBERES (ISCIII) Barcelona Spain