1. Department of Neurosurgery, School of Medicine, Yüzüncü Yıl University, Van, Turkey
2. Department of Neurosurgery, School of Medicine, Bozok University, Yozgat, Turkey
3. Department of Neurosurgery, School of Medicine, Dicle University, Diyarbakır, Turkey
4. Department of Radiology, School of Medicine, Yüzüncü Yıl University, Van, Turkey
5. Department of Obstetrics and Gynecology, School of Medicine, Yüzüncü Yıl University, Van, Turkey
6. Department of Pathology, School of Medicine, Yüzüncü Yıl University, Van, Turkey