1. Chemical, Medical and Environmental Science Department, National Physical Laboratory, Teddington, UK
2. Joint Department of Physics, The Institute of Cancer Research and The Royal Marsden Hospital NHS Foundation Trust, London, UK
3. Department of Nuclear Medicine, Royal Sussex County Hospital, Brighton, UK
4. Division of Radiotherapy and Imaging, The Institute of Cancer Research and The Royal Marsden Hospital NHS Foundation Trust, London, UK
5. Centre for Cancer Research and Cell Biology, Queen’s University Belfast, Belfast, UK