CXCL8 and systemic lupus erythematosus: ANOVA: Analysis of variance; CFU: Colony-Forming Unit; CRP: C-reactive protein; DBP: Diastolic Blood Pressure; ELISA: Enzyme-linked immunosorbent assay; IL1 beta: Interleukin 1 beta; IL6: Interleukin 6; IL8: Interleukin 8; Kt/V: Urea fractional clearance; NMWL: Nominal Molecular Weight Limit; NO: Nitric Oxide; SBP: Systolic Blood Pressure; SLE: Systemic Lupus Erythematosus; TNF alpha: Tumor Necrosis Factor alpha