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PMMA membrane (BK-F) is able to clear sCD40 from patient’s sera. Levels of serum sCD40 were measured by ELISA just before and after dialysis session in 19 patients for PMMA (BK-2.1F) membranes (A and B) or 12 patients for high-permeability non-PMMA membranes (C). *Non-parametric Wilcoxon U-test.
