Anti-N-Methyl-D-Aspartate Receptor EncephalitisParaneoplastic Cerebellar DegenerationLimbic EncephalitisParaneoplastic SyndromesParaneoplastic Syndromes, Nervous SystemAntibodiesAntibody SpecificityAntibodies, ViralAntibodies, BacterialAntibodies, MonoclonalAntibody FormationAntibodies, NeutralizingAntibody AffinityFluorescent Antibody TechniqueAntibodies, Anti-IdiotypicBinding Sites, AntibodyReceptors, N-Methyl-D-AspartateHIV AntibodiesEpitopesAntibodies, NeoplasmAntibodies, ProtozoanAntibodies, AntinuclearCross ReactionsAutoantibodiesImmunoglobulin MAntibodies, FungalNeutralization TestsMolecular Sequence Data