1. Research Oncology, King's College London, London, UK
2. Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands
3. Department of Radiological Sciences, Sapienza University of Rome, School of Medicine, Rome, Italy
4. Department of Radiology, St Bartholomew's Hospital, London, UK
5. Cancer Epidemiology Group, Division of Cancer Studies, King's College London, London, UK