1. Department of Neurosurgery Kagoshima University, Graduate School of Medical and Dental Sciences Kagoshima Japan
2. Epilepsy Center, TMG Asaka Medical Center Asaka Japan
3. Department of Neurology Nakamura Memorial Hospital Sapporo Japan
4. Epilepsy Center, Hiroshima University Hospital Hiroshima Japan
5. Epilepsy Center, National Hospital Organization Nagasaki Medical Center Omura Japan
6. Department of Neuropsychiatry Kurume University Kurume Japan
7. Department of Neurosurgery Kindai University Osakasayama Japan
8. Comprehensive Epilepsy Center, Seirei Hamamatsu General Hospital Hamamatsu Japan
9. Department of Neurosurgery National Center Hospital, National Center of Neurology and Psychiatry Kodaira Japan
10. Department of Neurosurgery National Hospital Organization Nishiniigata Chuo Hospital Niigata Japan
11. Department of Neurosurgery National Hospital Organization, Shizuoka Institute of Epilepsy and Neurological Disorders Shizuoka Japan
12. Department of Neurology National Hospital Organization Yamagata Hospital Yamagata Japan
13. Eisai Co., Ltd. Bunkyo Japan
14. Eisai Inc. Nutley New Jersey USA
15. National Hospital Organization, Shizuoka Institute of Epilepsy and Neurological Disorders Shizuoka Japan