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Total FLC levels in SLE patients with low (n = 23)/normal (n = 22) C3 levels (A) (p = 0.073) and in SLE patients with low (n = 30)/normal (n = 15) C4 levels (B) (p = 0.030). Middle horizontal bars represent median and statistical significant differences are indicated with *, ** or *** for p-values less than 0.05, 0.01 or 0.001. FLCs—free light chains, SLE—systemic lupus erythematosus.
