1 Department of Neurosurgery, Saarland University Medical Center and Saarland University Faculty of Medicine, Homburg/Saar, Germany; Institute of Neuropathology, Saarland University Medical Center and Saarland University Faculty of Medicine, Homburg/Saar, Germany; Faculty of Medicine, University of Rzeszów, Poland. Electronic address: jacek.szczygielski@uks.eu.
2 Department of Neurosurgery, Saarland University Medical Center and Saarland University Faculty of Medicine, Homburg/Saar, Germany; Department of Neurosurgery, Charité University Medicine, Berlin, Germany.
3 Department of Neurosurgery, Saarland University Medical Center and Saarland University Faculty of Medicine, Homburg/Saar, Germany.