- Correspondence to Dr David S Lynch, Department of Molecular Neuroscience, The National Hospital for Neurology and Neurosurgery, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK;
- Received 11 March 2015
- Revised 31 March 2015
- Accepted 6 April 2015
- Published online 14 April 2016.
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