1. Department of Neurosurgery, Clinical Neuroscience Center, University Hospital Zurich, Zurich, Switzerland
2. University of Zurich, Zurich, Switzerland
3. Department of Pathology, University Hospital Erlangen, Erlangen, Germany
4. Department of Neuropathology, Clinical Neuroscience Center
5. Institute of Pathology and Molecular Pathology, University Hospital Zurich, Zurich, Switzerland
6. Department of Neuropathology, University Hospital Erlangen, Erlangen, Germany
7. Department of Oncology, Hospital Lucerne, Lucerne, Switzerland