1. King Saud bin Abdulaziz University for Health Sciences and King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
2. Department of Internal Medicine, American University of Beirut Medical Center, Beirut, Lebanon
3. Division of Critical Care Medicine, Department of Medicine, University of Ottawa, Ottawa Hospital Research Institute, Ottawa, Canada
4. King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
5. Section of Critical Care Medicine, Health Sciences Centre, University of Manitoba, Manitoba, Canada
6. Division of Critical Care Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada
7. Interdepartmental Division of Critical Care Medicine, Division of Respirology, Department of Medicine, University of Toronto, Toronto, Canada; and
8. Mount Sinai Hospital, Toronto, Canada