The movement disorder associated with NMDAR-antibody encephalitis: an expert-rater video study by Varley, JA, Bhatia, KP, Dale, RC, Fung, V, Granata, T, Tijssen, MAJ, Lang, A, Lin, J-P, Lim, M, Lynch, T, Nardocci, N, Sethi, KD, Irani, SR