GPT and hemophagocytic syndrome: Apart from this, Kaplan-Meier curve indicated that the HLH patients with post-treatment ferritin ≥1056.1 μg/L, platelets <100 × 109 /L or ALT >40 U/L had significantly worse survival versus the patients with post-treatment ferritin <1056.1 μg/L, platelets ≥100 × 109 /L or ALT ≤40 U/L (Fig. 1a-c).