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SF total white blood cells and knee clinical indexes before and after intra-articular TNF-α blockade. Synovial fluid total white blood cells (a) Thompson Articular Knee Index (b) and Knee Joint Articular Index (c) in 14 PsA patients before and after intra-articular TNF-α blockade: pre, at baseline; post, at the time the last synovial fluid sample was available for aspiration after one or more IA-E injections in each knee. Significance by Wilcoxon rank test.
