Affiliation: | aDepartment of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón, Madrid, Spain;bMedicine Department, School of Medicine, Universidad Complutense de Madrid, Madrid, Spain;cCIBER Enfermedades Respiratorias-CIBERES CB06/06/0058, Madrid, Spain;dCardiac Surgery Postoperative Care Unit, Hospital General Universitario Gregorio Marañón, Madrid, Spain |