AQP4 and autoimmune encephalitis: The CSF autoimmune encephalitis panel, including anti-NMDAR, gamma-aminobutyric acid (GABA) receptor, α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor, anti-leucine-rich glioma inactivated 1 (LGI-1) antibody, anti-contactin-associated protein-like 2 (CASPR2) antibody, DPPX, anti-aquaporin-4 (AQP-4) antibody, and anti-MOG antibodies, was negative.