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Serum 25(OH) concentration in healthy subjects and chronic spontaneous urticaria (CSU) patients with different disease activity. CSU (whole) vs. control, p < 0.05; CSU-moderate/severe vs. control, p < 0.05; CSU-moderate/severe vs. CSU-mild, p > 0.05; CSU-mild vs. control, p > 0.05.
