Tobias Derfuss1, Ludwig Kappos2. 1. Neurology Clinic and Policlinic, Departments of Medicine, Biomedicine, Clinical Research, and Biomedical Engineering, University Hospital Basel, University of Basel, Basel 4031, Switzerland. 2. Neurology Clinic and Policlinic, Departments of Medicine, Biomedicine, Clinical Research, and Biomedical Engineering, University Hospital Basel, University of Basel, Basel 4031, Switzerland. Electronic address: ludwig.kappos@usb.ch.