1. Department of Radiation Oncology, University Hospital Muenster, 48149 Muenster, Germany
2. Department of Pathology, University Hospital Schleswig-Holstein, 24105 Kiel, Germany
3. Department for Radiology, University Hospital Munich, LMU Munich, 81377 Munich, Germany
4. Department of Neurosurgery, University Hospital Muenster, 48149 Muenster, Germany
5. Department of Hematology, Oncology and Pneumology, University Hospital Muenster, 48149 Muenster, Germany