1. Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
2. Clinical Neuroscience Institute, Seoul National University Bundang Hospital, Seoungnam, Korea.
3. Department of Neurology, National Medical Center, Seoul, Korea.
4. Department of Neurology, Veterans Medical Research Institute, Veterans Health Service Medical Center, Seoul Korea.
5. Roa Neurology Clinic, Seongnam, Korea.
6. Department of Neurology, Chung-Ang University College of Medicine, Seoul, Korea.
7. Department of Neurology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
8. Department of Psychiatry, Asan Medical Center, Seoul, Korea.