1. Department of Internal Medicine, Division of Nephrology, Medical University of Graz, Graz 8036, Styria, Austria
2. Department of Neurology, Division of Neurogeriatrics, Medical University of Graz, Graz 8036, Styria, Austria
3. Institute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Graz 8036, Styria, Austria
4. Department of Neurology, Division of General Neurology, Medical University Graz, Graz 8036, Styria, Austria
5. Division of Neuroradiology, Interventional and Vascular Radiology, Department of Radiology, Medical University of Graz, Graz 8036, Styria, Austria