LCN2 and viral encephalitis: In contrast, LCN2 was almost absent or detected at very low levels in CSF of patients with anti-NMDAR encephalitis (median, 0.9 ng/mL; range, 0.2–27.8 ng/mL) or without CNS infection (median, 0.2 ng/mL; range, 0.2–120.3 ng/mL) (Fig. S1(A)).