- Correspondence to Dr Richard S McLachlan, Department of Clinical Neurological Sciences, University Hospital, London Health Sciences Centre (LHSC), 339 Windermere Road, London, Ontario, N6A 5A5, Canada;
- Received 4 August 2009
- Revised 13 November 2009
- Accepted 17 November 2009
- Published online 15 March 2011.
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