1. Department of Neurology and Clinical Neuroscience Center University Hospital Zurich and University of Zurich Zurich Switzerland
2. Epidemiology, Biostatistics and Prevention Institute (EBPI) University of Zurich Zurich Switzerland
3. Institute of Data Analysis and Process Design ZHAW Winterthur Winterthur Switzerland
4. Department of Neuroradiology and Clinical Neuroscience Center University Hospital Zurich and University of Zurich Zurich Switzerland
5. Diagnostic and Interventional Neuroradiology University Hospital of Berne Berne Switzerland
6. Department of Neurology University Hospital of Berne Berne Switzerland
7. Department of Diagnostic, Interventional and Pediatric Radiology University Hospital of Berne Berne Switzerland