Nuria Rodríguez-Núñez1, Francisco Gude2, Adriana Lama1, Carlos Rábade1, Alfonso Varela3, Romina Abelleira1, Ana Casal1, Vanessa Riveiro1, Manuel Taboada4, Antonio Pose5, Luis Valdés6. 1. Pulmonology Department, University Clinical Hospital of Santiago, Santiago de Compostela, Spain. 2. Epidemiology Department, Research Methods Group, University Clinical Hospital of Santiago, Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain. Electronic address: francisco.gude.sampedro@sergas.es. 3. Directorate of Healthcare Processes, University Clinical Hospital of Santiago, Santiago de Compostela, Spain. 4. Anesthesiology Department, University Clinical Hospital of Santiago, Santiago de Compostela, Spain. 5. Internal Medicine Department, University Hospital Complex of Santiago de Compostela, Santiago de Compostela, Spain. 6. Pulmonology Department, University Clinical Hospital of Santiago, Santiago de Compostela, Spain; Multidisciplinary Research Group on Pulmonology, Health Research Institute of Santiago de Compostela (IDIS), Spain.