1. Clinical Microbiology & Infectious Diseases, Transplant Coordination, IdISSC & IML Health Research Institutes, Hospital Clínico Universitario San Carlos, 28040 Madrid, Spain
2. Infectious Diseases Unit, La Fe (IIS) Health Research Institute, University Hospital La Fe, 46015 Valencia, Spain
3. Immunology, Microbiology and Parasitology Department, Faculty of Medicine and Nursing, University of País Vasco, 48940 Bizkaia, Spain
4. Multidisciplinary Sepsis Unit, Intensive Medicine Department, University Hospital Son Llàtzer, 07198 Palma de Mallorca, Spain
5. Instituto de Investigación Sanitaria Islas Baleares (IDISBA), 07198 Mallorca, Spain
6. Clinical Microbiology Service, University Hospital Ramón y Cajal, Institute Ramón y Cajal for Health Research (IRYCIS), 28034 Madrid, Spain
7. CIBER of Infectious Diseases (CIBERINFEC), National Institute of Health San Carlos III, 28034 Madrid, Spain
8. Clinical Microbiology & Infectious Diseases Service, University Hospital Gregorio Marañón, 28009 Madrid, Spain
9. IDIBAPS, CIBERES, 08007 Barcelona, Spain
10. Faculty of Health Sciences, Continental University, Huancayo 15304, Peru
11. Intensive Care Unit, INIBiCA, University Hospital of Jerez, Medicine Department, University of Cádiz, 11404 Jerez, Spain
12. Clinical Microbiology, University Hospital Miguel Servet, 50009 Zaragoza, Spain
13. Intensive Care Clinical Unit, Hospital Universitario Virgen Macarena, 41013 Sevilla, Spain
14. Intensive Medicine Department, University Hospital of Henares, 28802 Madrid, Spain
15. Emergency Department, University Hospital Toledo, University of Castilla La Mancha, 45007 Toledo, Spain
16. Emergency Department, Clinical University Hospital San Carlos, 28040 Madrid, Spain
17. Anesthesiology Department, Hospital Quirón Salud Valle del Henares, 28850 Madrid, Spain
18. Hospital at Home Unit, Clinic University Hospital San Carlos, 28040 Madrid, Spain
19. Pneumology Service, La Fe (IIS) Health Research Institute, University Hospital La Fe, 46015 Valencia, Spain
20. Hospital at Home Service, University of Torrejón, Torrejón de Ardoz, 28006 Madrid, Spain
21. National Influenza Center, Clinic University Hospital of Valladolid, University of Valladolid, 47003 Valladolid, Spain
22. Pneumology Service, Hospital Vall d’Hebron, 08035 Barcelona, Spain
23. Vall d’Hebron Institut de Recerca (VHIR), Vall d’Hebron Barcelona Hospital Campus, 08035 Barcelona, Spain
24. CIBER of Respiratory Diseases (CIBERES), Institute of Health San Carlos III, 28029 Madrid, Spain
25. Infectious Diseases & Microbiology Clinical Management Unit, University Hospital Virgen Macarena, IBIS, University of Seville, 41013 Sevilla, Spain
26. Pneumology Service, University Hospital Cruces, 48903 Barakaldo, Spain
27. Faculty of Medicine and Nursing, University of País Vasco, 48940 Bizkaia, Spain
28. Intensive Medicine Department, University Hospital La Fe, 46015 Valencia, Spain