1. Department of Neurosurgery, University Hospital Carl-Gustav-Carus, Technical University of Dresden, Fetscherstr. 74, Dresden, Germany
2. Faculty of Business Administration, University of applied Science HTW Dresden, Friedrich-List-Platz 1, Dresden, Germany
3. Division of Neurodegenerative Diseases, Department of Neurology, Technical University of Dresden, Fetscherstr. 74, Dresden, Germany
4. Department of Neurology, University of Rostock, Rostock, Germany