- Professor FGA van der Meché, Department of Neurology, University Hospital Rotterdam, Dijkzigt, Dr Molewaterplein 40, 3015 GD Rotterdam, The Netherlands. Telephone 0031 10 4633327; fax 0031 10 4633208.
- Received March 4, 1997
- Revised October 7, 1997
- Accepted October 16, 1997
- First published February 1, 1998.
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