Prognostic scoring model incorporating clinical characteristics for pediatric hemophagocytic lymphohistiocytosis: a multicenter retrospective study.

In contrast, for primary HLH, non-EBV HLH, rheumatologic-associated HLH, and HLH of undetermined cause, survival differences between risk groups did not reach statistical significance, which may be attributable to limited sample sizes or relatively homogeneous outcomes within these subtypes.

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