S100A11 and rheumatoid arthritis: We found that the in vitro secretion of S100A11 by neutrophils from RA patients was comparable to that of neutrophils from healthy controls after a 4 h (0.09 (0.08–0.11) vs. 0.08 (0.03–0.23) ng/ml; p = NS) or 24 h (1.24 (0.90–1.67) vs. 0.86 (0.62–1.55) ng/ml; p = NS) incubation interval.