1. Department of NeurologyYonsei University College of Medicine Seoul Korea
2. Department of NeurologyKeimyung University School of Medicine Daegu Korea
3. Department of NeurologyEwha Womans University School of Medicine Seoul Korea
4. Department of NeurologyChosun University School of Medicine Gwanju Korea
5. Department of RadiologyYonsei University College of Medicine Seoul Korea
6. Severance Integrative Research Institute for Cerebral & Cardiovascular DiseasesYonsei University College of Medicine Seoul Korea
7. Biostatistics Collaboration UnitYonsei Universeity College of Medicine Seoul Korea