1. Department of Cardiology, St George’s University Hospital , London , UK
2. School of Biomedical Engineering and Imaging Sciences, King’s College London , London , UK
3. Department of Clinical Therapeutics, National and Kapodistrian University of Athens , Athens , Greece
4. Department of Cardiothoracic and Vascular Surgery, German Heart Center Berlin , Berlin , Germany
5. Department of Medicine, San Joaquin General Hospital , French Camp, CA , USA
6. Division of Cardiology, University of California , San Francisco, CA , USA