1. University of Health Sciences Turkey, Istanbul Haseki Training and Research Hospital, Clinic of Neurosurgery, Istanbul, Turkey
2. University of Health Sciences Turkey, Istanbul Taksim Training and Research Hospital, Clinic of Neurosurgery, Istanbul, Turkey
3. University of Health Sciences Turkey, Istanbul Bakirkoy Prof. Dr. Mazhar Osman Mental Health and Neurological Diseases Training and Research Hospital, Clinic of Neurosurgery, Istanbul, Turkey
4. University of Health Sciences Turkey, Istanbul Kanuni Sultan Suleyman Training and Research Hospital, Clinic of Pathology, Istanbul, Turkey