- Dr Dirk W Droste, Klinik und Poliklinik für Neurologie der WWU Münster, Albert-Schweitzer-Strasse 33, D-48129 Münster, Germany. Telephone 0049 251 8348176; fax 0049 251 8348181.
- Received January 6, 1999
- Revised April 7, 1999
- Accepted April 7, 1999
- First published October 1, 1999.
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