- Dr Maria Thom, Department of Neuropathology, National Hospital for Neurology and Neurosurgery, Queen Square, London WC1N 3BG, UK. Telephone 0044 171 837 3611; fax 0044 171 916 9546.
- Received March 17, 1998
- Revised October 15, 1998
- Accepted October 29, 1998
- First published July 1, 1999.
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