CD40LG and chronic kidney disease: Median values for serum immunoglobulins (Ig) were within normal ranges in both HC (median values–IgG 8.83g/L, IgA 2.13g/L, IgM 0.88g/L) and CKD (median values—IgG 10.14g/L, IgA 2.59g/L, IgM 0.87g/L) (S3 Fig).