1. Department of Cardiology, The Heart Center, Copenhagen University Hospital Rigshospitalet , Blegdamsvej 9, Copenhagen 2100 , Denmark
2. Department of Clinical Medicine, University of Copenhagen , Blegdamsvej 3B, 2200 Copenhagen , Denmark
3. Department of Cardiology, Odense University Hospital , JB Winsløvvej 4, Odense 5000 , Denmark