1 Institute for Stroke and Dementia Research, Department of Neurology, Klinikum der Universität München, Ludwig-Maximilians-Universität LMU, Munich, Germany.
2 Institute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig-Maximilians-Universität LMU, Munich, Germany.
3 Department of Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.