1. Prehospital Emergency Medical Services, Central Denmark Region, Aarhus
2. Department of Anesthesiology and Intensive Care, Aarhus University Hospital, Aarhus, Denmark
3. Research Center for Emergency Medicine, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
4. Emergency Department, Aarhus University Hospital, Aarhus, Denmark
5. Department of Cardiology, Viborg Regional Hospital, Viborg, Denmark
6. Department of Anesthesiology and Intensive Care, Herning Regional Hospital, Herning, Denmark
7. Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers, Denmark
8. Department of Anesthesiology and Intensive Care, Horsens Regional Hospital, Horsens, Denmark
9. Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg, Denmark
10. Elective Surgery Centre, Silkeborg Regional Hospital, Silkeborg, Denmark
11. Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
12. Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark