1. Division of Neurology, St. Mary's Hospital, Kurume, Fukuoka, Japan.
2. Cerebrovascular Medicine, St. Mary's Hospital, Kurume, Fukuoka, Japan.
3. Dermatology, St. Mary's Hospital, Kurume, Fukuoka, Japan.
4. Radiology, St. Mary's Hospital, Kurume, Fukuoka, Japan.
5. Department of Neurology, Aomori Prefectural Central Hospital, Aomori, Japan.