CXCL1 and systemic lupus erythematosus: Significantly increased serum CXCL1 levels were noted in SLE patients with severe disease activity [2482.22 (1589.93–3760.29) pg/ml] compared with the no/mild disease activity [279.02 (122.38–1144.32) pg/ml] and moderate disease activity SLE [1066.96 (615.38–1618.66) pg/ml] groups (p < 0.001).