1. Department of Neuropathology, DGNN Brain Tumor Reference Center, University Hospital Bonn , Bonn, Germany
2. Institute of Neuropathology, University Hospital Münster , Münster, Germany
3. Department of Neurooncology, Center for Neurology and Center of Integrated Oncology (CIO), University Hospital Bonn , Bonn, Germany
4. Institute of Pathology, University Hospital Bonn , Bonn, Germany