1. Brain Imaging Center, Goethe-University, Frankfurt, Neuroradiology, Schleusenweg 2-16, 60528 Frankfurt, Germany
2. Institute of Neuroradiology, Goethe-University, Frankfurt, Germany
3. Max-Planck-Institute of Biophysics, Goethe-University, Frankfurt, Germany
4. Department of Neurology, Goethe-University, Frankfurt, Germany