1. Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne , Cologne , Germany
2. Institute of Neuroscience and Medicine (INM-3, -4), Research Center Juelich , Juelich , Germany
3. Department of Experimental Pediatric Oncology, Faculty of Medicine and University Hospital Cologne, University of Cologne , Cologne , Germany
4. Department of Stereotactic and Functional Neurosurgery, Faculty of Medicine and University Hospital Cologne, University of Cologne , Cologne , Germany
5. Institute of Neuropathology, Faculty of Medicine and University Hospital Cologne , Cologne , Germany
6. Institure of Radiology, Division of Neuroradiology, Faculty of Medicine and University Hospital Cologne, University of Cologne , Cologne , Germany
7. Department of Nuclear Medicine, University Hospital Aachen , Aachen , Germany
8. Center for Integrated Oncology (CIO), Universities of Aachen , Bonn, Cologne, and Duesseldorf, Cologne , Germany