GAD2 and Encephalopathy: In the autoimmune CNS disorder group alone, three patients were found to have encephalopathy-specific neural antibodies including high titre GAD65 (serum only tested), α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPA-R) antibody and unclassified antibody (which robustly stained murine brain on immunofluorescence assay, but no other tissues [gut and kidney], in both serum and CSF).