1. Department of Internal Medicine, Stadtspital Zurich , Birmensdorferstrasse 497, 8063 Zürich , Switzerland
2. Royal Brompton Hospital, National Heart & Lung Institute, Imperial College London , London , UK
3. Department of Emergency Medicine, Helsinki University Hospital, University of Helsinki , Helsinki , Finland
4. Intensive Care Unit, Ghent University Hospital , Ghent , Belgium
5. Department of Intensive Care, Hôpital Ambroise-Paré AP-HP , Boulogne-Billancourt , France
6. Department of Anesthesia, Burn and Critical Care Medicine, AP-HP, Hôpitaux Universitaires Saint-Louis-Lariboisière, FHU PROMICE, INI-CRCT, and Université de Paris, MASCOT, Inserm , Paris , France
7. Research Direction, Consorci Sanitari Integral, University of Barcelona , Barcelona , Spain