Department of Neurosurgery, Medical Center University of Freiburg, Breisacher Straße 64, 79106, Freiburg, Germany. Faculty of Medicine, University of Freiburg, Freiburg, Germany. Department of Neuroradiology, Medical Center - University of Freiburg, Freiburg, Germany. Clinic for Neuropediatrics and Neurorehabilitation, Epilepsy Center for Children and Adolescents, Schön Klinik, Vogtareuth, Germany. Department of Neurosurgery, University of Aachen, Aachen, Germany. Department of Neurosurgery, Medical Center University of Freiburg, Breisacher Straße 64, 79106, Freiburg, Germany. dieter.henrik.heiland@uniklinik-freiburg.de. Faculty of Medicine, University of Freiburg, Freiburg, Germany. dieter.henrik.heiland@uniklinik-freiburg.de.