CD40LG and systemic lupus erythematosus: Total IgG (P = 0.557), IgA (P = 0.173), IgM (P = 0.139), and EndoCAb IgG (P = 0.402) levels were the same in SLE patients untreated and treated with immunosuppressive and/or immunomodulatory drugs (Figures 3A–D).