Affiliation: | a Biological Imaging Centre, MRC Clinical Sciences Centre, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, United Kingdom b Institute of Neurology, University College London, London WC1N 3BG, United Kingdom c Molecular Imaging Group, MRC Clinical Sciences Centre, Imperial College London, MRI Unit, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, United Kingdom |