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Kaplan-Meier survival curves of children with hemophagocytic lymphohistiocytosis. (a) Survival curve of HLH patients with or without CNS symptoms. (b) Survival curve of HLH patients with or without imaging changes. (c) Survival curve of HLH patients with or without CSF changes. (d) Survival curve of HLH patients with or without CNS involvement. HLH: Hemophagocytic lymphohistiocytosis; CNS: Central nervous system; CSF: Cerebrospinal fluid; OS: Over-all survival.
