1. Department of Neurology (T.R.M., U.F.), Inselspital, Bern University Hospital, University of Bern, Switzerland.
2. Institute of Diagnostic and Interventional Neuroradiology, Institute of Diagnostic, Interventional and Pediatric Radiology and Department of Neurology (J.K.), Inselspital, Bern University Hospital, University of Bern, Switzerland.
3. Department of Cardiology (L.R.), Inselspital, Bern University Hospital, University of Bern, Switzerland.