1. Department of Neurology and GeriatricsKagoshima University Graduate School of Medical and Dental Sciences Kagoshima Japan
2. Department of Cardiovascular Medicine, Nephrology and Neurology, Graduate School of MedicineUniversity of the Ryukyus Okinawa Japan
3. Department of Neurology, Graduate School of MedicineThe University of Tokyo Tokyo Japan
4. National Hospital Organization Okinawa National Hospital Okinawa Japan
5. Department of NeurologyNational Center of Neurology and Psychiatry Tokyo Japan
6. Department of Child NeurologyNational Center of Neurology and Psychiatry Tokyo Japan
7. North Medical CenterKyoto Prefectural University of Medicine Kyoto Japan