CD40LG and systemic lupus erythematosus: Remarkably, correlation analysis of the viscoelastic characteristics of plasma clots with laboratory signs of immune inflammation confirmed that the mechanical properties (especially the viscosity) of plasma clots strongly and significantly correlated with the signs of acute phase of SLE assessed by erythrocyte sedimentation rate, the levels of fibrinogen, β-2 globulin, antibodies to β-glycoprotein 1, and IgM (Table 4).