1Department of Neurosurgery, University Hospital Basel, Schönbeinstrasse 40, CH-4031 Basel, Switzerland, E-mail: bjoern.oettinghaus@unibas.ch
2Division of Neuropathology, Institute of Pathology, University Hospital Basel, Schönbeinstrasse 40, CH-4031 Basel, Switzerland, E-mail: bjoern.oettinghaus@unibas.ch