1 Research Center for Emergency Medicine, Aarhus University, Denmark; Department of Medicine, Randers Regional Hospital, Denmark; Department of Anesthesiology and Critical Care Medicine, Children's Hospital of Philadelphia, United States. Electronic address: kglerup@clin.au.dk.
2 Research Center for Emergency Medicine, Aarhus University, Denmark; Department of Medicine, Randers Regional Hospital, Denmark.
3 University of Warwick, Warwick Medical School, United Kingdom; Department of Critical Care, University Hospitals Birmingham NHS Foundation Trust, United Kingdom.