1 Department of Neurology & Stroke, University of Tübingen, Germany; Hertie Institute for Clinical Brain Research, University of Tübingen, Germany.
2 Department of Neurology & Stroke, University of Tübingen, Germany; Hertie Institute for Clinical Brain Research, University of Tübingen, Germany; CERVO Brain Research Centre, Quebec, Canada; Department of Psychiatry and Neurosciences, Université Laval, Quebec, Canada.
3 SRH Gesundheitszentrum Bad Wimpfen GmbH, Bei der alten Saline 2, 74206 Bad Wimpfen, Germany.
4 Department of Neurology & Stroke, University of Tübingen, Germany; Hertie Institute for Clinical Brain Research, University of Tübingen, Germany. Electronic address: ulf.ziemann@uni-tuebingen.de.