1. Department of Cardiology, The Heart Centre, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
2. Department of Cardiology, Zealand University Hospital Roskilde, Roskilde, Denmark
3. Department of Cardiology, Odense University Hospital, Odense, Denmark
4. Department of Cardiology, Copenhagen University Hospital Gentofte, Copenhagen, Denmark
5. Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
6. Department of Clinical Epidemiology, Centre for Clinical Research and Prevention, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark
7. Emergency Medical Services, University of Copenhagen, Copenhagen, Denmark