1. Department of Neurology, Zealand University Hospital, Roskilde, Denmark
2. Unit of Clinical Biostatistics Aalborg University Hospital, Aalborg, Denmark
3. Department of Cardiology, Herlev & Gentofte Hospital, Hellerup, Denmark
4. Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
5. Department of Cardiology and Clinical Research, Nordsjaellands University Hospital, Hillerød, Denmark