1. Department of Neurology, University Hospital Schleswig-Holstein, Kiel, Germany
2. Department of Radiology and Neuroradiology, University Hospital Schleswig-Holstein, Kiel, Germany
3. Department of Neurology, FEK Neumünster, Germany
4. Department of Neurology, Imland Klinik, Rendsburg, Germany
5. Department of Neurology, Klinikum Itzehoe, Germany
6. Department of Internal Medicine, Klinik Preetz, Germany
7. Department of Neurology, DRK Kliniken Berlin, Berlin, Germany
8. Department of Neurology, Helios Klinik, Schleswig, Germany