Disease activity according to DAS28 in 12 patients with RA treated with infliximab and switched to etanercept. Mean DAS values are shown for infliximab (INF; baseline, 6 weeks of treatment, last infusion) and etanercept (ETC; baseline, 3 and 6 months of treatment). Comparison was made using a non-parametric test (Wilcoxon). m, months; w, weeks.