- Dr Jaime R Lopez, Department of Neurology, Stanford Medical Center, 300 Pasteur Drive, Stanford, CA 94305, USA. Telephone 001 650 723 1975; fax 001 650 725 7459; email
- Received December 30, 1998
- Revised June 15, 1998
- Accepted July 13, 1998
- First published February 1, 1999.
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