1. Department of Neurosurgery, Hannover Medical School, Hannover, Germany.
2. Department of Haematology, Haemostaseology, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany.
3. Department of Neuropathology, Hannover Medical School, Hannover, Germany.
4. Department of Institute for Diagnostic and Interventional Neuroradiology, Hannover Medical School, Hannover, Germany.