Additional file 2.

(a) The serum levels of IL-21 in Figure 4a. (b) The serum levels of IL-21 in Figure 4b. (c) The serum levels of IL-21 in Figure 4c. (d) The serum levels of IL-21 in Figure 4d. (e) The serum levels of IL-21 in Figure 5a. (f) The serum levels of IL-21 in Figure 5b. (g) The serum levels of IL-21 in Figure 5c.

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Liu et al. Arthritis Research & Therapy 2012 14:R255   doi:10.1186/ar4100