“…A dual semi‐quantitative scale combining staining intensity and percentage of positive cells was used to evaluate the protein staining. Briefly, staining of BCRP was scored semi‐quantitatively for intensity (0, no expression; 1, weak; 2, moderate; 3, strong) and for the percentage of positive cells (0, < 10%; 1, 10–40%; 2, 40–70%; 3, (70%) . The staining of ERβ was scored semi‐quantitatively for intensity (0, no expression; 1, weak; 2, moderate; 3, strong) and for the percentage of positive cells (1, 0–1/100; 2, 1/100–1/10; 3, 1/10–1/3; 4, 1/3–2/3; 5, 2/3–1), according to a previously published scoring standard of ERα .…”