Serum IL-1β (a), IL-1Rα (b), TNF-α (c), soluble tumor necrosis factor receptor (d), IL-6 (e), IL-18 (f), IL-17 (g), and IL-10 (h) protein levels among patients with AOSD with active and inactive disease activity (active [n = 41] versus inactive [n = 21]) as well as HC (n = 50) were determined by ELISA. The gene discussed is IL18; the disease is adult-onset Still disease.