1. Department of Neurosurgery, Izmir Katip Celebi University Ataturk Education and Research Hospital, Izmir, Turkey
2. Department of Neurosurgery, Bozyaka Education and Research Hospital, Izmir, Turkey
3. Department of Radiology, Ege University School of Medicine, Izmir, Turkey
4. Department of Anatomy, Ankara University School of Medicine, Ankara, Turkey