1 Chairman of the Société Française de Neurologie (SFN), France; French Reference Centre on Paraneoplastic Neurological Syndromes and Autoimmune Encephalitis, Hospices civils de Lyon, MeLiS-UCBL-CNRS UMR 5284, INSERM U1314, université Claude-Bernard-Lyon 1, Lyon, France. Electronic address: [email protected].