Immunohistochemical staining of TMA section was performed as previously described49 (link). Rabbit polyclonal antibodies for ERα (BS1114), ERβ (BS8465), PR (BS1766) and EGFR (BS1533) were purchased from Bioworld Technology (Minnesota, USA). Rabbit polyclonal antibody for ERα36 (CY1109) was purchased from Cell Applications (San Diego, CA, USA). Rabbit polyclonal antibody for HER2 (ab131490) was purchased from Abcam (Cambridge, MA, USA). These rabbit polyclonal antibodies were used as primary antibodies at 1:100 dilution and biotinylated goat-anti-rabbit IgG (ZB-2010, Zhongshan Golden Bridge Biotechnology, China) was used as a secondary antibody at 1:500 dilution.
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