- Dr Tohru Matsuura, Department of Neurology, Hokkaido University School of Medicine, Kita-14, Nishi-5, Kita-ku, Sapporo 060, Japan. Telephone +81 (11) 716-1161 (extension 6028); fax +81 (11) 700-5356.
- First published February 1, 1998.
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