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Effect of H4R ligands on tumour vascularization. (A) Representative Masson's trichrome stained images of tumour specimens; x100 and x630 original magnification. Scale bar = 20 μm. (B) The number of intratumoural vessels was quantified in 10 random fields (×100 magnification). Data are shown as means ± SEM. (*P < 0.05, **P < 0.01 vs. Control. ANOVA and Newman–Keuls Multiple Comparison Test).
