The immunohistochemistry (IHC) experiment and IHC score calculations were conducted as previously described [22 (link)]. Briefly, an anti-Ki67 antibody (1:100, Service Bio, Wuhan, China) was used to detect the Ki67 expression in paraformaldehyde-fixed, paraffin-embedded murine tumour tissue. Images were obtained by ECLIPSE Ti microscope system (Nikon, Japan).
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