1. Department of Neurology (A.-C.S., J.G., O.T., D.M.H.), University Hospital Essen, University of Duisburg-Essen, Germany.
2. Institute of Diagnostic and Interventional Radiology and Neuroradiology (C.M.), University Hospital Essen, University of Duisburg-Essen, Germany.
3. Department of Neurology, University Medical Center Goettingen, Germany (T.R.D.).
4. Division of Psychology, Department of Life Sciences, Centre for Cognitive Neuroscience, College of Health, Medicine and Life Sciences, Brunel University London, United Kingdom (B.d.H.).
5. Department of Neurology, University Hospital Bern, Switzerland (C.L.A.B.).