1. Intensive Care Medicine Department, Vall d’Hebron University Hospital, Barcelona, Spain
2. Shock, Organ Dysfunction, and Resuscitation Research Group, Vall d’Hebron Research Institute, Barcelona, Spain
3. Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
4. Centro de Investigación Biomédica en Red Enfermedades Respiratorias. Instituto de Salud Carlos III, Madrid, Spain