1 From the Department of Neurology (S.D., F.H., C.B., A.R., B.A., A.M., J.P.), Centre Hospitalier la Timone, Aix Marseille Univ; French Reference Center on Paraneoplastic Neurological Syndromes and Autoimmune Encephalitis (B.J., M.B., B.A., A.M., J.P.); Department of Neurology (B.J., M.B., B.A., A.M., J.P.), Centre Hospitalier Lyon Sud, Hospices Civils de Lyon; Department of Ophtalmology (N.S., B.A., A.M., J.P.), Centre Hospitalier la Timone, Aix Marseille Univ; Departement of Medical Biology (V.D., B.A., A.M., J.P.), Centre Hospitalier Lyon Sud, Hospices Civils de Lyon; and Aix Marseille Univ (B.A., A.M., J.P.), CNRS, CRMBM, Marseille, France.