1. Department of Critical Care Medicine, Ghent Medical School and University Hospital, Ghent, Belgium.
2. Critical Care Department, Hospital Vall d'Hebron, CIBERES, Universitat Autonoma de Barcelona, Spain.
3. University of Texas Health Science Departments of Pulmonary/Critical Care, and Internal Medicine, and South Texas Veterans Health Care System, San Antonio, Texas.
4. UCINC, Hospital de São José, Centro Hospitalar de Lisboa Central, Lisbon, Portugal.
5. Discipline of Anesthesiology and Critical Care, The University of Queensland School of Medicine, and Department of Intensive Care Medicine, Royal Brisbane and Women's Hospital, Herston QLD, Australia.
6. Department of Anesthesiology and Intensive Care, Friedrich-Schiller-University, Jena, Germany.
7. Department of Intensive Care, Radboud University Nijmegen Medical Centre, Nijmegen, Netherlands.
8. Department of Intensive Care and Anesthesiology, Hôpital Nord, AP-HM, Unité de Recherche en Maladies Infectieuses et Transmissibles (URMITE), Aix-Marseille University, Marseilles, France.
9. Department of Intensive Care Medicine, Craigavon Area Hospital, Portadown, United Kingdom.
10. Division of Pulmonary and Critical Care Medicine, Texas Tech University HSC, Odessa, Texas.
11. Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium.