- Correspondence to Professor Kailash P Bhatia, Sobell Department of Motor Neuroscience and Movement Disorders, University College London (UCL), Institute of Neurology Queen Square, London WC1N 3BG, UK;
- Received December 12, 2012
- Revised January 10, 2013
- Accepted January 14, 2013
- First published February 13, 2013.
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