1. Department of Emergency Medicine, University of Maryland Medical Center, Baltimore, MD, USA;
2. Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, MD, USA;
3. Department of Pediatrics, University of Maryland School of Medicine, Baltimore, MD, USA;
4. Department of Emergency Medicine, Stony Brook University School of Medicine, Stony Brook, NY, USA;
5. Department of Internal Medicine, University of Maryland School of Medicine, Baltimore, MD, USA;
6. Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, MD, USA