1. Department of Neurosurgery, Julius Maximilians University, Wuerzburg, D‑97080 Wuerzburg, Germany
2. Department of Neuroradiology, Julius Maximilians University, Wuerzburg, D‑97080 Wuerzburg, Germany
3. Department of Neuropathology, Julius Maximilians University, Wuerzburg, D‑97080 Wuerzburg, Germany
4. Department of Neurosurgery, Clinical Centre of Aschaffenburg-Alzenau, D-63739 Aschaffenburg, Germany