1. Department of Neurosurgery, Good Samsun Hospital, Busan, Korea.
2. Department of Diagnostic Radiology, Busan Paik Hospital, Inje University, Busan, Korea.
3. Department of Neurosurgery, Busan Paik Hospital, Inje University, Busan, Korea.
4. Department of Neurology, Busan Paik Hospital, Inje University, Busan, Korea.