1. Department of Neurology, National Cerebral and Cardiovascular Center, Osaka, Japan.
2. Department of Neurology, Taipei Veterans General Hospital, Taipei, Taiwan.
3. Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.
4. Brain Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan.
5. Department of Neurology, Jeju National University, Jeju, Korea.
6. Institute for Medical Science, Jeju National University, Jeju, Korea.