Levels for absolute neutrophil count (a.), platelet count (b.) and ferritin (c.) in association with anakinra trial. The horizontal axis in each figure indicates time in days from admission. The orange triangles indicate the first and last day that daily anakinra was given. In Figure 2a and 2b the red line denotes the threshold below which diagnostic criteria is met for HLH while in Figure 2c this line denotes the threshold above which HLH criteria is met.