1. Clinical Cardiology and Cardiovascular Imaging Unit, Galeazzi-Sant’Ambrogio Hospital IRCCS , via Cristina Belgioioso 173, 20100 Milan , Italy
2. Clinic of Electrophysiology, Herz-und Diabeteszentrum NRW, Ruhr-University Bochum , Georgstraße 11, 32545 Bad Oeynhausen, Germany
3. Keble College, University of Oxford , OX1 3PG Oxford , UK
4. Department of Radiology, Liverpool Heart and Chest Hospital , Thomas Drive, Liverpool , UK
5. Liverpool Centre for Cardiovascular Science , Department of Radiology, Liverpool , UK