1. Department of Neurology, Ulm University, Ulm, Germany
2. Department of Radiology/Neuroradiology, University and Rehabilitation Clinics Ulm, Ulm, Germany
3. Diagnostic Radiology Department, South Egypt Cancer Institute, Assiut University, Egypt
4. Department of Neurology, Ulm University, Oberer Eselsberg 45, Ulm, Germany