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(a) Median level of NK cytotoxicity in patients with HLH versus other than HLH. (b) Median level of NK cytotoxicity in patients with variable febrile diseases with cytopenia. (c) Median ferritin level at diagnosis in patients with HLH versus other than HLH. (d) Median ferritin level at diagnosis in patients with variable febrile diseases with cytopenia.
HLH, hemophagocytic lymphohistiocytosis; MAS, macrophage activation syndromes; NK, natural killer.
