1. Centre for Neuromuscular Diseases, UCL Institute of Neurology and National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
2. Department of Neuroradiology, National Hospital of Neurology and Neurosurgery, Queen Square, London, UK
3. Department of Neurosurgery, National Hospital of Neurology and Neurosurgery, Queen Square, London, UK
4. Department of Clinical Neurophysiology, Norfolk and Norwich University Hospital, Norwich UK
5. Department of Neuropathology, National Hospital of Neurology and Neurosurgery, Queen Square, London, UK
6. National Amyloidosis Centre, Royal Free Hospital, Rowland Hill Street, London, UK