1. Department of Neurology, Neuroscience Center, Samsung Medical Center and Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Samsung Biomedical Research Institute (SBRI), Seoul, Korea.
3. Department of Neurology, Seoul National University Boramae Hospital, Seoul, Korea.
4. Department of Radiology, Samsung Medical Center, Sungkyunwan University School of Medicine, Seoul, Korea.