1. Department of Cardiology, St. George's University Hospitals NHS Foundation Trust London UK
2. Department of Cardiology, Ain Shams University Cairo Egypt
3. Department of Cardiothoracic & Vascular Surgery, German Heart Center Berlin Berlin Germany
4. Department of Cardiovascular research, German Center of Cardiovascular Research (DZHK) partner site Berlin Berlin Germany
5. University of Berlin Institute (STI) of Cardiovascular Perfusion Berlin Germany
6. Departmemnt of Cardiothoracic surgery, University Hospital La Paz Madrid Spain
7. Department of Electrophysiology, San Rafaele Hospital Milan Italy
8. Department of Cardiology and Electrophysiology, Isala Hospital Zwolle The Netherlands
9. Department of Cardiology, University Hospital Zurich Zürich Switzerland