1. Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
3. Department of Psychology, The Catholic University of Korea College of Medicine, Seoul, Korea.
4. Department of Neurology, Medical College, Dankook University, Cheonan, Korea.