1. Departments of Neurosurgery, Albert-Ludwigs-Universitat, Freiburg, Germany
2. Neurology, Albert-Ludwigs-Universitat, Freiburg, Germany
3. Institute of Medical Biometry and Medical Informatics, Albert-Ludwigs-Universitat, Freiburg, Germany
4. Center for Data Analysis and Model Building, Albert-Ludwigs-Universitat, Freiburg, Germany
5. Section of Neuroradiology, Albert-Ludwigs-Universitat, Freiburg, Germany