- Dr P Anand, Academic Department of Neurology, St Bartholomew’s and the Royal London School of Medicine and Dentistry, The Royal London Hospital, Whitechapel, London E1 1BB, UK. Telephone and fax 0044 171 377 7286; email
- Received May 15, 1998
- Revised July 29, 1998
- Accepted September 23, 1998
- First published March 1, 1999.
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