1. Research Center for Emergency Medicine, Aarhus University Hospital, Aarhus, Denmark2Department of Anesthesiology, Aarhus University Hospital, Aarhus, Denmark3Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts
2. Department of Anesthesiology, Aarhus University Hospital, Aarhus, Denmark
3. Department of Emergency Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
4. Division of Cardiology, Department of Medicine, VA Eastern Colorado Health Care System, Denver6Now with Minneapolis Heart Institute, Minneapolis, Minnesota
5. Anaesthesia and Intensive Care Medicine, Southmead Hospital, Bristol, England
6. University of Bristol, Bristol, England9Department of Anaesthesia and Intensive Care Medicine, Royal United Hospital, Bath, England
7. Institute of Public Health, Charité-Universitätsmedizin Berlin, Berlin, Germany
8. Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts11Division of Pulmonary and Critical Care Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts