1. Department of Neurology, Research Institute and Hospital of National Cancer Center, Korea
2. Department of Neurology, Kosin University College of Medicine, Korea
3. Current affiliation: Department of Neurology, The Catholic University of Korea, Korea
4. Department of Radiology, Research Institute and Hospital of National Cancer Center, Korea
5. Department of Neurology, College of Medicine, Yeungnam University College of Medicine, Korea
6. Department of Neurology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Korea
7. Department of Neurology, Korea University Medical Center, Korea
8. Department of Neurology, Ilsan Paik Hospital, Inje University College of Medicine, Korea