1. 1 Department of Neurology , Medical University of Plovdiv , Bulgaria
2. 2 Research Institute at Medical University of Plovdiv , Bulgaria , Bulgaria
3. 3 Department of Clinical laboratory , Medical University of Plovdiv , Bulgaria
4. 4 Translational Neuroscience Complex , Medical University of Plovdiv , Bulgaria
5. 5 Department of Imaging Diagnostics , Medical University of Sofia , Bulgaria
6. 6 Department of Diagnostic Imaging , Medical University of Plovdiv , Bulgaria
7. 7 Department of Human Anatomy, Histology and Emryology , Medical University of Plovdiv , Bulgaria