| William D Knight Carbon-11-Pittsburgh compound B positron emission tomography imaging of amyloid deposition in presenilin 1 mutation carriersWilliam D Knight Department of Neurodegeneration, UCL Institute of Neurology, University College London, Dementia Research Centre, Queen Square, London WC1N 3BG, UK Brain 134:293-300. 2011 Pure progressive amnesia and the APPV717G mutationWilliam D Knight Department of Neurodegenerative Diseases, Dementia Research Centre, Institute of Neurology, University College London, UK Alzheimer Dis Assoc Disord 23:410-4. 2009 Word-finding difficulty: a clinical analysis of the progressive aphasiasJonathan D Rohrer Dementia Research Centre, Department of Neurodegenerative Disease, Institute of Neurology, University College London, Queen Square, London WC1N 3BG, UK Brain 131:8-38. 2008
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