- Dr René M Müri, Department of Neurology, University of Bern, Inselspital, CH-3010 Bern, Switzerland. Telephone 0041 632 21 11; fax 0041 632 96 79; email
- Received August 22, 1997
- Revised December 18, 1997
- Accepted February 5, 1998
- First published September 1, 1998.
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