- Dr Michiaki Koga, Department of Neurology, Dokkyo University School of Medicine, Kitakobayashi 880, Mibu, Shimotsuga, Tochigi 321–0293, Japan. Tel: 0081 282 86 1111 extention 2733 or 2578; fax 0081 10-60-89313; email:
- First published February 1, 1999.
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