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Lactoferrin levels correlate with serum CRP and RF status. Lactoferrin levels were measured in synovial fluid of 24 patients with RA and correlated with (A) age, (B) disease duration, (C) serum ESR, (D) presence of joint erosion, (E) serum CRP and (F) seropositivity for RF. Data were analysed by Spearman's correlation.
