1. Sleep and Non-Invasive Ventilation Unit, Pulmonology Department, University Hospital of Navarra, Navarra, Spain
2. Interventional Pneumology Department, University Hospital of Navarra, Navarra, Spain
3. Pulmonolgy Department, University Hospital of Navarra, Navarra, Spain
4. Institute of Medical Research Alfredo Lanari, University of Buenos Aires, Buenos Aires, Argentina