1. Institute of Diagnostic and Interventional Radiology; University Hospital of Cologne; Cologne Germany
2. Department of Neurology; University Hospital of Cologne; Cologne Germany
3. Philips Healthcare Germany; Hamburg Germany
4. Cognitive Neuroscience; Institute of Diagnostic and Interventional Radiology; Technical University Munich; Munich Germany
5. Institute of Neuroscience and Medicine (INM-3); Research Centre Juelich; Jülich Germany
6. Department of Neuroradiology; Krankenhaus der Barmherzigen Brüder; Trier Germany