1. Department of Radiology, Ministry of Health Ankara Training and Research Hospital, Ankara, Turkey

2. Department of Neurology, Hacettepe University Medical School, Ankara, Turkey

3. National Magnetic Resonance Research Center (UMRAM), Bilkent University, Ankara, Turkey

4. Department of Biostatistics, Hacettepe University, Ankara, Turkey

5. Department of Radiology, Hacettepe University Medical School, Ankara, Turkey; National Magnetic Resonance Research Center (UMRAM), Bilkent University, Ankara, Turkey