1. Department of Neurosurgery, School of Medicine, Klinikum Rechts der Isar, Technical University Munich, 80333 Munich, Germany
2. Department of Neurosurgery, National Institute of Neurology and Neurosurgery, Mexico City 14269, Mexico
3. Department of Neurosurgery, Charite–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 10117 Berlin, Germany
4. Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
5. Department of Neuroradiology, School of Medicine, Klinikum Rechts der Isar, Technical University Munich, 80333 Munich, Germany