1. Department of Neurosurgery, Kocaeli University School of Medicine, Kocaeli, Turkey,
2. Department of Neurosurgery, Kocaeli University School of Medicine, Kocaeli, Turkey
3. Department of Radiology, Kocaeli University School of Medicine, Kocaeli, Turkey
4. Department of Pathology, Kocaeli University School of Medicine, Kocaeli, Turkey