Fig. 1

Comparisons of serum cytokine concentrations (pg/ml) among control, primary HLH, and secondary HLH. a IL-2; b IL-4; c IL-6; d IL-10; e TNF-α; f IFN-γ. The center horizontal line of the central box is the median (50th percentile), the bottom and top of the box are the 25th and 75th percentiles. The whiskers extend from each end of the box to the 5th and 95th percentiles of the values, respectively. Outliers are the data with values beyond the 5th and 95th percentiles