1. Yüzüncü Yıl University, School of Medicine, Department of Neurosurgery, Van, Turkey
2. Bozok University, School of Medicine, Department of Neurosurgery, Yozgat, Turkey
3. Yüzüncü Yıl University, School of Medicine, Department of Emergency Medicine, Van, Turkey
4. Van Regional Training and Teaching Hospital, Clinic of Neurosurgery, Van, Turkey
5. Yüzüncü Yıl University, School of Medicine, Department of Radiology, Van, Turkey
6. Adnan Menderes University, School of Medicine, Department of Neurosurgery, Aydın, Turkey