1 Department of Neurology, Medical Faculty, University Hospital Düsseldorf, Heinrich Heine University, Düsseldorf, Germany. alicegrizzel.willison@med.uni-duesseldorf.de.
2 Department of Neurology, Medical Faculty, University Hospital Düsseldorf, Heinrich Heine University, Düsseldorf, Germany.
3 Department of Medicine, University Hospital Münster, Albert-Schweitzer-Campus 1, Münster, Germany.
4 Department of Neurology, Medical Faculty, University Hospital Düsseldorf, Heinrich Heine University, Düsseldorf, Germany. hans-peter.hartung@uni-duesseldorf.de.
5 Department of Neurology, Medical University of Vienna, Vienna, Austria. hans-peter.hartung@uni-duesseldorf.de.
6 Brain and Mind Center, University of Sydney, Sydney, Australia. hans-peter.hartung@uni-duesseldorf.de.
7 Department of Neurology, Palacky University, Olomouc, Czech Republic. hans-peter.hartung@uni-duesseldorf.de.