1. Department of Cardiology, University Heart and Vascular Center Hamburg
2. Department of Rhythmology, University Heart Center Lübeck
3. Department of Medicine III (Cardiology, Angiology, Intensive Care Medicine), University Hospital Schleswig-Holstein Kiel
4. German Center of Cardiovascular Research (DZHK)
5. Department of Cardiology and Internal Intensive Care Medicine, Asklepios Hospital St. Georg
6. Institute of Cardiovascular Sciences and SWBH (Sandwell and Birmingham Hospitals) and UHB (University Hospitals Birmingham) NHS (National Health Service) Trusts