1. Department of Neurosurgery, İstanbul Education and Research Hospital, İstanbul, Turkey;
2. Department of Neurosurgery, Dr. Lütfi Kırdar Kartal Education and Research Hospital, İstanbul, Turkey;
3. Department of Pathology, İstanbul Education and Research Hospital, İstanbul, Turkey;
4. Department of Nephrology, İstanbul Education and Research Hospital, İstanbul, Turkey