IL17A and rheumatoid arthritis: Similar results were observed for absolute numbers of IL-17 + neutrophils (RA mean 42.1 ± 99.4 × 103/ml [0–639.2 × 103/ml] vs. healthy control mean 3.42 ± 4.0 × 103/ml [0–16.14 × 103/ml], p < 0.0001) (Fig. 3c).