Affiliation: | 1. Department of Neurosurgery, University Hospital of Essen, Hufelandstrasse 55, 45122, Essen, Germany 2. Institute of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital of Essen, Essen, Germany 4. Department of Neurosurgery, Klinikum Nordtstadt, Hannover, Germany 3. Center of Neuroradiology, Klinik Hirslanden, Zurich, Switzerland
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