1. Research Center for Emergency Medicine, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
2. Center for Resuscitation Science, Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts
3. Department of Intensive Care Medicine, Randers Regional Hospital, Randers, Denmark
4. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts
5. Department of Intensive Care, Aarhus University Hospital, Aarhus, Denmark