CD40LG and rheumatoid arthritis: The levels of RF_IgA, RF_IgG, and RF_IgM in nonhypertensive RA patients were [42.65 (25.15, 85.34) IU/mL], [24.56 (69.77, 10.06) U/mL], and [103.30 (7.48, 155.75) IU/mL], respectively.