TNF and rheumatoid arthritis: An almost significant decrease of the antibody titer was also observed in RA patients treated with TNF-α inhibitors (T1 median: 1,239 BAU/ml, IQR: 520.1–3,706 vs. T6 median: 26.5 BAU/ml, IQR: 14.9–108.8, p = 0.062).