MIF and systemic lupus erythematosus: Serum MIF levels in SR SLE patients were 130 (78 to 225.75) ng/ml, higher than the MIF levels in SS SLE patients (91.8 (65.12 to 132.75) ng/ml; P = 0.049) and in healthy controls (56.54 (26 to 101) ng/ml; P = 0.008).