1. Department of Cardiology St George's University Hospital London UK
2. Department of Cardiothoracic and Vascular Surgery German Heart Center Berlin Germany
3. Department of Cardiology San Rafaele Hospital Milan Italy
4. Department of Cardiology University Hospital La Paz Madrid Spain
5. Department of Electrophysiology HELIOS Heart Center—University of Leipzig Leipzig Germany
6. Department of Cardiology University Hospital Zurich Zürich Switzerland
7. Department of Cardiology Guy's and St Thomas's Hospital London UK
8. Department of Cardiology Manchester University Hospitals Manchester UK