1 Department of Emergency Medicine, University of Colorado School of Medicine, Aurora, CO, United States. Electronic address: sarah.perman@cuanschutz.edu.
2 Department of Emergency Medicine, University of Colorado School of Medicine, Aurora, CO, United States; University of Colorado EMS Institute, Aurora, CO, United States.
3 Division of Cardiology, Department of Medicine, University of Colorado School of Medicine, Aurora, CO, United States.