Affiliation: | (1) MRC Centre for Neuromuscular Diseases, Department of Molecular Neurosciences, UCL Institute of Neurology, National Hospital for Neurology and Neurosurgery, Box 102, WC1N 3BG London, UK;(2) University College London Hospitals, London, UK;(3) Dorset County Hospital, Dorchester, UK;(4) Poole Hospital, Poole, UK;(5) National Hospital for Neurology and Neurosurgery, London, UK |