1. Nordsjaellands Hospital, Department of Research, Hilleroed, Denmark
2. Aalborg University Hospital, Department of Epidemiology and Biostatistics, Aalborg, Denmark
3. Gentofte University Hospital, Department of Cardiology, Copenhagen, Denmark
4. Emergency Medical Services, Copenhagen, Denmark
5. Nordsjaellands Hospital, Department of Cardiology and Clinical Research, Hilleroed, Denmark