IL17A and rheumatoid arthritis: Women in the early stage of RA (disease duration below 1 year) displayed significantly elevated [median and IQR] IL-17A levels than those with more prolonged disease duration: 22.8 [7.8–124.3] pg/ml vs. 4.4 [2.9–12.0]pg/ml, p = 0.017, Mann–Whitney U test.