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ZR30 inhibits blood vessel formation in intracranial xenografts of human glioblastoma multiforme primary cultures. A, Representative pictures of CD31 immunohistochemistry on PBS‐ or ZR30‐treated xenografts. B, Comparison of blood vessel density (BVD) in ZR30‐ and PBS‐treated xenografts in 3 and 2 mice, respectively. The average of BVD in PBS‐treated xenografts was set at unity. Columns, mean (PBS, n = 20; ZR30, n = 30); bars, SEM. P < .05; ** P < .005
