1. Department of Radiology, Epsom and St. Helier University Hospitals NHS Trust, London, United Kingdom
2. Department of Radiology, Mid and South Essex NHS Foundation Trust, Southend, United Kingdom
3. School of Biomedical Engineering and Imaging Sciences, Kings College London, London, United Kingdom
4. Department of Radiology, Hospital Universitario Fundación Alcorcón, Madrid, Spain
5. Department of Radiology, New York University Grossman School of Medicine, New York, New York