1. Department of Neurology, School of Medicine, Ewha Womans University Mokdong Hospital, Seoul, Korea.
2. Public Healthcare Center, Seoul National University Hospital, Seoul, Korea.
3. Department of Neurology, Seoul National University Hospital, Seoul, Korea.
4. Department of Neurology, Neuroscience & Dementia Research Center, Seoul National University College of Medicine, Seoul, Korea.
5. Department of Neurology, Seoul National University-Seoul Metropolitan Government Boramae Medical Center, Seoul, Korea.
6. Department of Neurology, Seoul National University College of Medicine, Seoul, Korea.