1. Department of Neurosurgery, Busan-Ulsan Regional Cardio-Cerebrovascular Center, Dong-A University College of Medicine, Busan, Korea.
2. Department of Radiology, Busan-Ulsan Regional Cardio-cerebrovascular Center, Dong-A University College of Medicine, Busan, Korea.
3. Department of Neurology, Busan-Ulsan Regional Cardio-cerebrovascular Center, Dong-A University College of Medicine, Busan, Korea.