1. Department of Neurosurgery, Klinikum Rechts der Isar, Technical University, 81675 Munich, Germany
2. Department of Neurology, University Hospital Erlangen, Friedrich-Alexander University Erlangen Nuremberg, 91054 Erlangen, Germany
3. Core Facility Microbiom, ZIEL Institute for Food & Health, Technical University of Munich, 85354 Freising, Germany