Fig. 3From: Expression of metalloproteinases MMP-2 and MMP-9 is associated to the presence of androgen receptor in epithelial ovarian tumorsFrequency of expression of MMP-2 (a) and MMP-9 (b) in ovarian tumors. Bars represent the proportions of positive immunohistochemical reaction in epithelium and the stroma of tissue samples. Statistical analysis was performed using the test for contrasting the proportions of the groups,* P ≤ 0.05, ** P ≤ 0.01Back to article page