University of Copenhagen - Herlev & Gentofte Hospital, Nordsjaellands Hospital, Nordsjaellands Hospital, Nordsjaellands Hospital, Aalborg University Hospital, University of Copenhagen - Copenhagen Emergency Medical Services, Aalborg University - Department of Health Science and Technology,, Regions Hospital Nordjylland, Aalborg University, Faculty of Medicine, Aalborg University Hospital & Clinical Institute, Department of Cardiology, University of Copenhagen - Copenhagen Emergency Medical Services, University College of Borås (UCB) - Prehospen - Centre for Prehospital Research, University of Amsterdam - Department of Cardiology, University of Copenhagen - Department of Cardiology, University of Copenhagen - Rigshospitalet, University of Copenhagen - Herlev & Gentofte Hospital and Aalborg University, Faculty of Medicine, Aalborg University Hospital & Clinical Institute, Department of Cardiology