1. Department of Cardiology Aarhus University Hospital Aarhus Denmark
2. Department of Clinical Medicine, Faculty of Health Aarhus University Aarhus Denmark
3. Department of Cardiology Odense University Hospital Odense Denmark
4. The Danish Pacemaker and ICD Register Odense University Odense Denmark
5. Department of Heart, Lung, and Vascular Surgery Odense University Hospital Odense Denmark