Figure 4

Regulatory T cell levels by week in interferon-α 2b-treated patients with melanoma. (A) Individual regulatory T cell (Treg) levels by week in the 22 patients with melanoma treated with interferon-α 2b. (B)Box plot showing circulating regulatory T cell (Treg) levels by week in the 22 patients with melanoma treated with interferon-α 2b (P = not significant). Horizontal lines inside the boxes = median values; upper and lower boundaries of the boxes = first and third quartiles of the distribution; whiskers = mild outliers; and open dots = outliers.