1. Department of Neurology, Rostock University Medical Center, Rostock, Germany
2. Department of Neurology, Medical University of Vienna, Vienna, Austria
3. Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
4. Merck Healthcare Germany GmbH, Weiterstadt, Germany
5. Department of Neurology, Bayreuth Hospital, Bayreuth, Germany
6. Neurological Group Practice, Ulm, Germany
7. Neurological Private Practice, Hamburg, Germany
8. Neurocenter Itzehoe, Itzehoe, Germany
9. Department of Neurology, Inselspital Bern, University Hospital Bern, Bern, Switzerland