Reinhard Hohlfeld1, Martin Kerschensteiner2. 1. Institute of Clinical Neuroimmunology, Biomedical Centre and University Hospital, Ludwig Maximilians University, Munich D-81377, Germany; Munich Cluster of Systems Neurology (SyNergy), Munich, Germany. Electronic address: reinhard.hohlfeld@med.uni-muenchen.de. 2. Institute of Clinical Neuroimmunology, Biomedical Centre and University Hospital, Ludwig Maximilians University, Munich D-81377, Germany; Munich Cluster of Systems Neurology (SyNergy), Munich, Germany.