- Correspondence to: Dr Steff C Lewis Neurosciences Trials Unit, Division of Clinical Neurosciences, Western General Hospital, Crewe Road, Edinburgh EH4 2XU, UK;
- Received 19 August 2003
- Accepted 24 November 2003
- Revised 24 November 2003
- Published in print 1 February 2004.
- Published online 23 January 2004.
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