1 Department of Medicine, East Kent Hospitals NHS Trust, Kent, United Kingdom.
2 Department of Clinical Oncology, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom.
3 Department of Radiology, The Royal Wolverhampton NHS Trust, Wolverhampton, United Kingdom.
4 Department of Clinical Oncology, Raigmore Hospital, Inverness Scotland, United Kingdom.
5 Department of Clinical Oncology, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom; Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom.