1. Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain
2. Gregorio Marañón Health Research Institute, Madrid, Spain
3. Emergency Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain
4. Medicine Department. School of Medicine, Universidad Complutense de Madrid, Madrid, Spain
5. CIBER de Enfermedades Respiratorias (CIBERES CB06/06/0058), Madrid, Spain