1. Department of Neurosurgery, Universitatsklinikum Bonn Zentrum fur Nervenheilkunde, Bonn, North Rhine Westphalia, Germany
2. Department of Neurosurgery, Asklepios Kliniken Hamburg GmbH Asklepios Klinik Nord Standort Heidberg, Hamburg, Hamburg, Germany
3. Department of Neurosurgery, Medical Center University of Aachen, Aachen, NRW, Germany
4. Department of Neuroradiology, Asklepios Kliniken Hamburg GmbH Asklepios Klinik Nord Standort Heidberg, Hamburg, Hamburg, Germany
5. Department of Neuropathology, Asklepios Kliniken Hamburg GmbH Asklepios Klinik Nord Standort Heidberg, Hamburg, Hamburg, Germany