1. Department of Pneumology, Hospital Clinic, Barcelona; August Pi i Sunyer Biomedical Research Institute (IDIBAPS); University of Barcelona; SGR 911; Biomedical Research Networking Centres in Respiratory Diseases (CIBERES), Barcelona, Spain
2. Department of Anesthesiology and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli, Università Cattolica del Sacro Cuore, Rome, Italy
3. Department of Microbiology, Hospital Clinic, Barcelona, University of Barcelona, Barcelona, Spain
4. Department of Infectious Diseases, Hospital Clinic, Barcelona; IDIBAPS; University of Barcelona, Barcelona, Spain