1. Department of Neurology St. Josef Hospital Bochum Ruhr University Bochum Bochum Germany
2. Medical Faculty Ruhr University Bochum Bochum Germany
3. Department of Neurology Community Hospital Herdecke Herdecke Germany
4. Department of Neurology Alfried Krupp Hospital Essen Essen Germany
5. Department of Neurology Hospital of the City Ludwigshafen Ludwigshafen Germany
6. Department of Neurology University of Heidelberg Heidelberg Germany