1. Marmara University, School of Medicine, Department of Neurosurgery, İstanbul, Turkey

2. Gazi University, School of Medicine, Department of Neurosurgery, Ankara, Turkey

3. Yenimahalle Traning and Education Hospital, Department of Neurosurgery, Ankara, Turkey

4. Yenimahalle Traning and Education Hospital, Department of Pathology, Ankara, Turkey

5. TOBB University of Economics and Technology, Department of Micro and Nanotechnology, Ankara, Turkey

6. Yenimahalle Traning and Education Hospital, Department of Orthopaedics, Ankara,Turkey

7. Ankara Traning and Education Hospital, Department of Neurosurgery, Ankara, Turkey

8. Marmara University, Neuroscience Institute, Department of Anesthesiology, İstanbul, Turkey