1. Prehospital Center Region Zealand, Næstved, Denmark
2. Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
3. Copenhagen Emergency Medical Services, Copenhagen, Denmark
4. National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
5. Department of Cardiology, Herlev Gentofte University Hospital, Gentofte, Denmark
6. Department of Cardiology, Nordsjaellands Hospital, Hillerød, Denmark
7. Department of Clinical Medicine, Aalborg University Hospital, University of Copenhagen, Copenhagen, Denmark
8. Danish Clinical Quality Program (RKKP), National Clinical Registries, Department of Clinical Medicine, Denmark