1. Royal Brompton and Harefield Hospitals, Guys' and St Thomas NHS Trust and School of Biomedical Engineering and Imaging Sciences, Faculty of Life Sciences and Medicine, King's College London , London, UK
2. Department of Cardiology, Leiden University Medical Center , 2333 ZA Leiden, The Netherlands
3. Cardiovascular Imaging Program, Department of Radiology, Heart and Vascular Center, Harvard Medical School , Boston, MA, USA
4. Cardiovascular Imaging Program, Department of Medicine, Heart and Vascular Center, Harvard Medical School , Boston, MA, USA
5. Division of Cardiovascular Medicine, Department of Medicine, Harvard Medical School , Boston, MA, USA
6. Division of Nuclear Medicine and Molecular Imaging, Department of Radiology, Brigham and Women’s Hospital, Harvard Medical School , Boston, MA, USA