1. Department of Neurosurgery, Unfallkrankenhaus Berlin, Berlin, Germany
2. Department of Neurosurgery, Bródno Mazovia Hospital, Warsaw, Poland
3. Institute of Radiology and Neuroradiology, Unfallkrankenhaus, Berlin, Germany
4. Department of Pediatric Neurosurgery, Charité Universitätsmedizin, Berlin, Germany