1. Department of Interventional Radiology, Guy's and St. Thomas' NHS Foundation Trust, London, UK
2. School of Biomedical Engineering & Imaging Sciences, Faculty of Life Sciences & Medicine, Kings College London, London, UK
3. Department of General Internal Medicine, Guy's & St Thomas' Foundation Trust, London, UK
4. Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK