- Dr Gonzalo Alarcón, Department of Clinical Neurophysiology, King’s College Hospital, Denmark Hill, London SE5 9RS, UK. Telephone 0044 171 346 5309; fax 0044 171 346 5308.
- Received March 26, 1998
- Revised August 24, 1998
- Accepted September 23, 1998
- First published March 1, 1999.
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