1. Department Neurosurgery, Adnan Menderes University Faculty of Medicine, Aydin, Turkey.
2. Department Neurology, Adnan Menderes University Faculty of Medicine, Aydin, Turkey.
3. Department Neurosurgery, Soonchunhyang University Bucheon Hospital, Bucheon, Korea.
4. Department Neurosurgery, Soonchunhyang University Chonan Hospital, Cheonan, Korea.