1. Department of Cardiology; Odense University Hospital; Odense Denmark
2. Department of Cardiology; Herlev University Hospital; Herlev Denmark
3. Department of Health, Science and Technology; Aalborg University; Aalborg Denmark
4. Department of Cardiology; Rigshospitalet; Copenhagen Denmark
5. Department of Cardiology; Frederiksberg University Hospital; Frederiksberg Denmark
6. Department of Cardiology; Gentofte University Hospital; Hellerup Denmark