1. Department of Cardiology; Herlev-Gentofte University Hospitals; Copenhagen Denmark
2. National Institute of Public Health; Copenhagen Denmark
3. Department of Cardiology; University of Southern Denmark; Odense Denmark
4. The Danish Heart Foundation
5. Department of Cardiology; Odense University Hospital; Odense Denmark
6. Department of Cardiology; Aarhus University Hospital; Aarhus Denmark
7. Department of Cardiology; Rigshospitalet; Copenhagen Denmark
8. Department of Cardiology; Aalborg University Hospital; Aalborg Denmark