1 Department of Neurosurgery, Saarland University Medical Center and Saarland University Faculty of Medicine, Kirrberger Str. 90.5, 66421, Homburg, Saar, Germany. [email protected].
2 Department of Neurosurgery, Saarland University Medical Center and Saarland University Faculty of Medicine, Kirrberger Str. 90.5, 66421, Homburg, Saar, Germany.