Figure 1From: Survivin gene levels in the peripheral blood of patients with gastric cancer independently predict survivalGene expression levels of the four genes of interest in N87 human gastric cancer cells (as measured by quantitative real time PCR: see text for details). The natural logarithm of the expression levels is reported on the y axis: the axis origin (0) represents the reference sample (called calibrator) with which all experimental samples are compared in the relative quantification method (see text for details).Back to article page