- Dr Praveen 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 30 December 1997
- Revised 4 March 1998
- Accepted 12 March 1998
- Published online 1 September 1998.
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