1. Copenhagen Emergency Medical Services, Copenhagen, Denmark
2. Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
3. Danish Clinical Quality Program, National Clinical Registries, Denmark
4. National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
5. Department of Clinical Investigation, Nordsjællands Hospital, Hillrød, Denmark
6. Department of Emergency Medicine, University of Washington, Seattle
7. Department of Medicine, University of Washington, Seattle
8. Department of Cardiology, Herlev Gentofte University Hospital, Copenhagen, Denmark