AMPH and autoimmune encephalitis: In addition to these, serum autoimmune encephalitis (NMDA, CASPR-2, LGI-1, GABA-B, AMPA1, AMPA2), paraneoplastic (anti-GAD, Ma1/Ma2, CRMP-5, amphiphysin, Yo, PCA2, Hu, Ri) antibody panels and anti- were assessed in 21 and 19 patients respectively and all were negative.