LGI1 and viral encephalitis: S100 protein: ↑ in anti-NMDAR and anti-DPPX encephalitis PGRN: ↑ in anti-NMDAR encephalitis Nfl:↑ in anti-NMDAR and anti-LGI1 encephalitis GFAP: ↑ in anti-NMDAR and limbic encephalitis Total-tau: ↑ in anti-NMDAR encephalitis