1. Neurodegeneration Imaging Group, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London; London UK
2. Parkinson's Centre of Excellence, Department of Neurology; King's College Hospital Foundation Trust; London UK
3. Department of Basic and Clinical Neuroscience, Institute of Psychiatry; Psychology and Neuroscience (IoPPN), King's College London; London UK
4. Memory Research Group, Nuffield Department of Clinical Neurosciences; University of Oxford, John Radcliffe Hospital; Oxford OX3 9DU
5. Centre for Neurodegeneration and Neuroinflammation, Division of Brain Sciences, Department of Medicine; Imperial College London; London UK
6. Department of Nuclear Medicine, Institute of Clinical Medicine; Aarhus University; Aarhus Denmark
7. Department of Nuclear Medicine; King's College Hospital Foundation Trust; London UK
8. Division of Neurology; Newcastle University; Newcastle upon Tyne UK