1. Department of Neurosurgery, Eberhard-Karls-University, Tuebingen, Germany
2. Center for CNS Tumors, Comprehensive Cancer Center Tuebingen-Stuttgart, University Hospital Tuebingen, Eberhard-Karls-University Tuebingen, Tuebingen, Germany
3. Department of Neuropathology, Eberhard-Karls-University, Tuebingen, Germany