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Serum IgG (a), IgG1 (b), IgG2 (c) and IL-8 (d) # in mild (blue circles) and severe (red squares) CF patients. Line represents median and p-values represent results of Mann–Whitney U test. Note: # 1 high outlier value has been removed in the severe group (48 pg/mL). * p < 0.05.
