1. Department of Neurology, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Düsseldorf, Germany (Gruchot J, Reiche L, Küry P)
2. Department of Neurology, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland (Chan A, Hoepner R, Küry P)