Figure 6From: Enumeration and phenotypical analysis of distinct dendritic cell subsets in psoriatic arthritis and rheumatoid arthritisDetecting interferon alpha in synovial fluid. Rheumatoid arthritis (RA) synovial fluid (SF), psoriatic arthritis (PsA) SF and osteoarthritis (OA) SF contain interferon alpha (IFN-α). The level of IFN-α in SF from RA patients (n = 18), PsA patients (n = 15) and OA patients (n = 8) was measured by ELISA. Squares indicate individual samples expressed on a log scale. -, median.Back to article page