1. Department of Cardiology; Aarhus University Hospital; Aarhus Denmark
2. Department of Clinical Epidemiology; Aarhus University Hospital; Aarhus Denmark
3. Institute of Cardiovascular Sciences; City Hospital; University of Birmingham; Birmingham United Kingdom
4. Department of Cardiology; Odense University Hospital; Odense Denmark
5. Department of Cardiology; Aalborg University Hospital; Aalborg Denmark