- Dr Hilkka Soininen, Department of Neuroscience and Neurology, University of Kuopio, PO Box 1627, FIN-70 211 Kuopio, Finland. Telephone 00358 17 173 012; fax 00358 17 173019; email
- Received August 8, 1997
- Revised August 8, 1997
- Accepted February 24, 1998
- First published September 1, 1998.
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