1. Department of Cardiology, Rigshospitalet, Copenhagen University Hospital , Blegdamsvej 9, 2100 Copenhagen , Denmark
2. Department of Cardiology, Odense University Hospital , JB Winsløvvej 4, 5000 Odense , Denmark
3. Department of Internal Medicine and Cardiology, Heart Centre Dresden, Technische Universität Dresden , Dresden , Germany
4. Department of Cardiothoracic and Vascular Anesthesia and Intensive Care, AO SS Antonio e Biagio e Cesare Arrigo , Alessandria , Italy
5. Department of Cardiology, Heart Centre Leipzig at University of Leipzig and Leipzig Heart Science , Leipzig , Germany