1. Department of Pneumology, Hospital Clinic of Barcelona, Spain
2. August Pi i Sunyer Biomedical Research Institute, University of Barcelona, Spain
3. Biomedical Research Networking Centers in Respiratory Diseases, Barcelona, Spain
4. Department of Anesthesiology and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli, Università Cattolica del Sacro Cuore, Rome, Italy
5. Instituto Politécnico de México, México City