1. Department of Emergency Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
2. Department of Anesthesia, UCHealth, and University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
3. Departments of Medicine and Surgery, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
4. Division of Hospital Medicine, Department of Internal Medicine, Dell Medical School, University of Texas at Austin, Austin, Texas, USA.