1. Department of Cardiology, Robert-Bosch-Krankenhaus, Auerbachstr. 110, 70376 Stuttgart, Germany
2. Department of Emergency Medicine, Yale University, New Haven, CT, USA
3. The Queen Elizabeth Hospital Discipline of Medicine, University of Adelaide, Central Adelaide Local Health Network, Adelaide, Australia
4. Department of Cardiology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark