GRM1 and viral encephalitis: Most patients were diagnosed with anti-NMDA receptor encephalitis (N = 353; 93.14%), followed by anti-VGKC-complex encephalitis (N = 17; 4.48%), anti-GAD associated encephalitis (N = 9; 2.37%), anti-AMPA receptor encephalitis (N = 1; 0.26%), anti-GABA receptor encephalitis (N = 1; 0.26%), anti-mGluR5 encephalitis (N = 1; 0.26%), and anti-mGluR1 encephalitis (N = 1; 0.26%).