1. From the Departments of Radiology, Başkent University School of Medicine, Ankara, Turkey

2. From the Department of Radiology , Başkent University School of Medicine, Ankara, Turkey.

3. Departments of Pathology, Başkent University School of Medicine, Ankara, Turkey

4. From the Departments of Neurosurgery, Başkent University School of Medicine, Ankara, Turkey

5. Department of Biostatistics Ankara University School of Medicine, Ankara, Turkey