1. Pneumology Department, Parc Sanitari Sant Joan de Déu, Sant Boi de Llobregat, Spain
2. Medicine Department, Universitat Autònoma de Barcelona, Barcelona, Spain
3. Multidisciplinary Sleep Unit, Pneumology Department, Vall d’Hebron University Hospital, Barcelona, Spain
4. Pneumology Department, Vall d’Hebron University Hospital, Barcelona, Spain
5. Centro de Investigación Biomédica en Red Enfermedades Respiratorias (CIBERES), Instituto de la Salud Carlos III (ISCIIII), Madrid, Spain
6. Statistics and Bioinformatics Unit, Vall d’Hebron Research Institute, Barcelona, Spain