- Dr Fumihito Yoshii, Department of Neurology, Tokai University School of Medicine, Bohseidai, Isehara, Kanagawa 259–1193, Japan. Telephone 0081 463 93 1121; fax 0081 463 94 8764.
- Received November 11, 1997
- Revised February 6, 1998
- Accepted February 16, 1998
- First published September 1, 1998.
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