1. Department of Neurology; Seoul Medical Center; Seoul Korea
2. Department of Neurology; Dong-A University College of Medicine; Busan Korea
3. Department of Neurology, Haeundae Paik Hospital; Inje University College of Medicine; Busan Korea
4. Department of Neurology; Kangdong Sacred Heart Hospital, Hallym University College of Medicine; Seoul Korea
5. Department of Radiology; Kangdong Sacred Heart Hospital, Hallym University College of Medicine; Seoul Korea