- Dr A Otto, Neurologische Klinik und Poliklinik, Georg-August-Universität Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany. Telephone 0049 551 39 6636; fax 0049 551 39 7020.
- Received July 8, 1997
- Revised September 30, 1997
- Accepted October 3, 1997
- First published April 1, 1998.
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