1. Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
2. Aalborg AF Study Group, Aalborg University Hospital, Aalborg, Denmark
3. Unit of Clinical Biostatistics, Aalborg University Hospital, Aalborg, Denmark
4. Department of Cardiology, Gentofte Hospital Copenhagen University Hospital, Hellerup, Denmark
5. Department of Cardiology, Rigshospitalet Copenhagen University Hospital, Kobenhavn, Denmark
6. Private Hospital Mølholm, Heart Clinic Molholm, Mølholm, Denmark
7. Department of Cardiology, Odense University hospital, Odense, Denmark
8. Department of Cardiology, Zealand University Hospital Roskilde, Roskilde, Denmark
9. Department of Thoracic, Cardiac and Vascular Surgery, Odense University Hospital, Odense, Denmark