The immunohistochemistry protocol and semi-quantitative analysis were carried out as described in our previous study12 . The following antibodies were used12 23 (link)39 (link): rabbit anti-estrogen receptor-α polyclonal antibody (1:20, SC-542, Santa Cruz Biotechnology, Santa Cruz, CA, USA), rabbit anti-estrogen receptor-β polyclonal antibody (1:50, ab3577, Abcam Biotechnology, Cambridge UK), rabbit anti-proliferating cell nuclear antigen (PCNA) polyclonal antibody (1:15, SC-7907, Santa Cruz Biotechnology), and rabbit anti-ki-67 polyclonal antibody (1:200, SC-7907, Santa Cruz Biotechnology) were used. The Image-Pro Plus 6.0 System image analysis system was used for quantitative analysis.
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