1. Department of Neurophysiology Hamamatsu University School of Medicine1‐20‐1 Handayama, Higashi‐ku Hamamatsu 431‐3192 Japan
2. Department of Biochemistry Hamamatsu University School of Medicine 1‐20‐1 Handayama, Higashi‐ku Hamamatsu 431‐3192 Japan
3. Department of Pediatrics Showa University School of Medicine 1‐5‐8 Hatanodai, Shinagawa‐ku Tokyo 142‐8666 Japan
4. Department of Biochemistry Yokohama City University Graduate School of Medicine 3‐9 Fukuura, Kanazawa‐ku Yokohama 236‐0004 Japan
5. Department of Human Genetics Graduate School of Medicine Yokohama City University 3‐9 Fukuura, Kanazawa‐ku Yokohama 236‐0004 Japan
6. Department of Pediatric Neurology Pediatric Medical Care Center Osaka City General Hospital 2‐13‐22 Miyakojimahondori, Miyakojima‐ku Osaka 534‐0021 Japan
7. Department of Pediatrics Epilepsy Center Nishi‐Niigata Chuo National Hospital 1‐14‐1 Masago, Nishi‐ku Niigata 950‐2085 Japan
8. Department of Neurology Gunma Children's Medical Center 779 Shimohakoda, Hokkitsu‐machi Shibukawa Gunma 377‐8577 Japan
9. Department of Pediatric Neurology Seirei‐Mikatahara General Hospital 3453 Mikatahara‐cho, Kita‐ku Hamamatsu 433‐8558 Japan
10. Department of Pediatrics Toyohashi Municipal Hospital, Toyohashi 50 Hachikennishi, Aotake‐cho Toyohashi 441‐8570 Japan