1. Department of Diagnostic Imaging, Royal Marsden NHS Foundation Trust, Downs Rd, Sutton, Surrey SM2 5PT, UK.
2. Department of Radiology, Karolinska University Hospital, Stockholm, Sweden.
3. Department of Radiology, Telemedicine Clinic, Barcelona, Spain.
4. Department of Medical Oncology, Royal Marsden NHS Foundation Trust, Sutton, Surrey, UK.