31 systemic JIA pts: w/ systemic sxs (n=8), chronic arthritis (7), remission on meds (10) & remission off meds (6). High IL-18 levels & impaired IL-18 signaling in NK cells correlated with systemic Dz activity. High IL-18 impairs NK phosphorylation https://t.co/HlaQid7xGq https://t.co/0PbxC0pZtk