1. Department of Physiology, Anatomy, and Genetics University of Oxford Oxford United Kingdom
2. Oxford Centre for Clinical Magnetic Resonance Research, Division of Cardiovascular Medicine, Radcliffe Department of Medicine University of Oxford Oxford United Kingdom
3. Clarendon Laboratory, Department of Physics University of Oxford Oxford United Kingdom
4. The PET Centre and The MR Centre, Clinical Medicine Aarhus University and Aarhus University Hospital Aarhus Denmark
5. Nuffield Department of Clinical Neurosciences University of Oxford Oxford United Kingdom
6. Department of Pharmacology University of Oxford Oxford United Kingdom
7. Department of Radiology Oxford University Hospitals Oxford United Kingdom
8. Institute of Cancer and Genomic Sciences University of Birmingham Birmingham United Kingdom