1. Department of Diagnostic and Interventional Radiology, University Düsseldorf, Medical Faculty, Moorenstraße 5, 40225 Düsseldorf, Germany
2. Department of Neurology, Marienhospital Düsseldorf, Rochusstraße 2, 40479 Düsseldorf, Germany
3. Department of Neurology, University Düsseldorf, Medical Faculty, Moorenstraße 5, 40225 Düsseldorf, Germany
4. Department of Neurology, Krankenhaus St. Franziskus, Viersener Straße 450, 41063 Mönchengladbach, Germany