1. Department of Neurology, Section for Neuro-Oncology, Yale School of Medicine, New Haven, Connecticut
2. Department of Neurosurgery, Section for Neuro-Oncology, Ludwig-Maximilians-University, Munich, Germany
3. Department of Neurosurgery, Yale School of Medicine, New Haven, Connecticut
4. Department of Neurosurgery, Friedrich-Alexander-University, Erlangen-Nuernberg, Germany