1. Department of Neurology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea.
2. Department of Neurology, Uijeongbu Eulji Medical Center, Eulji University School of Medicine, Uijeongbu, Korea.
3. Department of Neurology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
4. Department of Psychology, Chungnam National University, Daejeon, Korea.
5. Department of Neurology, Chungnam National University Hospital, Daejeon, Korea.
6. Department of Neurology, Ajou University School of Medicine, Suwon, Korea.