1. Department of Neuroregeneration; Kitasato University School of Medicine; Sagamihara Japan
2. Department of Neurology; Ehime University School of Medicine; Matsuyama Japan
3. Department of Neurology; Wakayama Medical University; Wakayama Japan
4. Department of Neurology; National Hospital Organization, Sagamihara National Hospital; Sagamihara Japan
5. Department of Neurology; National Center Hospital, National Center of Neurology and Psychiatry; Tokyo Japan
6. Department of Biostatistics; Kitasato University School of Pharmacy; Tokyo Japan
7. Otsuka Pharmaceutical Company, Ltd.; Tokyo Japan
8. Department of Neurology; Juntendo University School of Medicine; Tokyo Japan