1 Department of Neurosurgery, Medical Faculty, Heinrich-Heine-University Düsseldorf, Moorenstraße 5, D-40225, Düsseldorf, Germany.
2 Department of Neurosurgery, Medical Faculty, Heinrich-Heine-University Düsseldorf, Moorenstraße 5, D-40225, Düsseldorf, Germany. Jasper.vanLieshout@med.uni-duesseldorf.de.
3 Department of Neurosurgery, Radboudumc Medical Center, Geert Grooteplein Zuid 10, 6525 GA, Nijmegen, The Netherlands. Jasper.vanLieshout@med.uni-duesseldorf.de.