- Correspondence to: Dr M M Wickremaratchi Department of Neurology, School of Medicine, Cardiff University, B2-C2 link, University Hospital of Wales, Heath Park, Cardiff CF14 4XN, Wales, UK;
- Received 19 July 2005
- Accepted 28 September 2005
- Published in print 1 May 2006.
- Published online 5 May 2006.
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