1 Division of Cardiothoracic Surgery, Department of Surgery, University of Utah Health, Salt Lake City, UT, USA. joseph.tonna@hsc.utah.edu.
2 Department of Emergency Medicine, University of Utah Health, 30 N 1900 E, 3C127, Salt Lake City, UT, 84132, USA. joseph.tonna@hsc.utah.edu.
3 Interdepartmental Division of Critical Care Medicine, Department of Medicine and Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada.
4 Division of Critical Care, Department of Pediatrics, University of Utah Health, Salt Lake City, UT, USA.
5 Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, MD, USA.