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.