1. Critical Care Department King Saud Medical City Riyadh Saudi Arabia
2. Emergency Department Harvard Medical School, Massachusetts General Hospital Boston Massachusetts USA
3. Critical Care Department Alberta Health Care Services Edmonton Alberta Canada
4. Research and Innovation Center King Saud Medical City–Ministry of Health, College of Medicine, Al Faisal University Riyadh Saudi Arabia
5. Department of Medicine University of South Carolina School of Medicine Columbia South Carolina USA
6. Department of Emergency Medicine St Francis Hospital Columbus Georgia USA