- Professor G Deuschl, Neurologische Klinik der Christian-Albrechts-Universität, Niemannsweg 147, D-24105 Kiel, Germany. Telephone 0049 431 597 2610; fax 0049 431 597 2712.
- Received November 6, 1996
- Revised June 2, 1997
- Accepted June 18, 1997
- First published January 1, 1998.
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