1. Cerrahpasa Faculty of Medicine, Department of Histology and Embryology, Istanbul University-Cerrahpasa, Istanbul, Turkey
2. Department of Histology and Embryology, School of Medicine, Marmara University, Istanbul, Turkey
3. Cerrahpasa Faculty of Medicine, Department of Neurosurgery, Istanbul University-Cerrahpasa, Istanbul, Turkey
4. Department of Radiation Oncology, School of Medicine, Dokuz Eylul University, Izmir, Turkey
5. Department of Pharmacology and Clinical Pharmacology, School of Medicine, Marmara University, Istanbul, Turkey
6. Cerrahpasa Medical Faculty, Department of Neurology, Istanbul University-Cerrahpasa, Istanbul, Turkey