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.
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 Multidisciplinary Research Group on Pulmonology, Health Research Institute of Santiago de Compostela (IDIS), Spain.