1. Department of Neurology, Alfried Krupp Hospital Essen and Ruhr University, Bochum, Germany
2. Northwest-German Stroke Circle e.V., Bochum, Germany
3. DRG Market, Osnabrück, Germany
4. Department of Neurology, University Hospital St. Josef-Hospital Bochum, Ruhr University, Bochum, Germany
5. Department of Neurology, Klinikum Dortmund, Dortmund, Germany
6. Department of Neurology, University of Heidelberg, Heidelberg, Germany