Usefulness of Interleukin-18 as a Diagnostic Biomarker to Differentiate Adult-Onset Still's Disease With/Without Macrophage Activation Syndrome From Other Secondary Hemophagocytic Lymphohistiocytosis in Adults. - Shiga T; Nozaki Y; Tomita D; Kishimoto K; Hirooka Y; Kinoshita K; Funauchi M; Matsumura I (Frontiers in immunology, 2021)