1. Service of Pneumology, University Clinical Hospital of Santiago de Compostela, Santiago de Compostela, Spain
2. Department of Preventive Medicine and Public Health, University of Santiago de Compostela, Santiago de Compostela, Spain
3. CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
4. Group of Epidemiology, Public Health and Evaluation of Health Services, Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
5. Service of Microbiology, University Clinical Hospital of Santiago de Compostela, Santiago de Compostela, Spain
6. Critical Care Department, University Clinical Hospital of Santiago de Compostela, Santiago de Compostela, Spain
7. Interdisciplinary Research Group in Pneumology, Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
8. Service of Pneumology, University Hospital of A Coruña, A Coruña, Spain