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Quantitative reverse transcriptase PCR (qPCR) was performed to assess angiogenic/vasculogenic gene expression on all tumor cell lines. The gene expression levels were standardized to GAPDH and are presented as the fold difference from RCC-Luc (mean +/− SD; n=3; *p<0.001, **p<0.01, #p<0.05 vs. RCC-Luc).
