1. Department of Neurosurgery, Pundang CHA Hospital, Pundang CHA Hospital, Pochon CHA University, Sungnam, Korea.
2. Department of Patholgy, Pundang CHA Hospital, Pochon CHA University College of Medicine, Sungnam, Korea.
3. Department of Neurology, Pundang CHA Hospital, Pochon CHA University College of Medicine, Sungnam, Korea.