Figure 1

Representative immunohistochemical staining of HER2, p53, and Ki67 in invasive ductal carcinoma. (a) Negative staining of HER2. (b) Positive staining of HER2. (c) Negative staining of p53. (d) Positive staining of p53. (e) Negative staining of Ki67. (f) Positive staining of Ki67.