Figure 1From: Detection of carcinoembryonic antigen messenger RNA in blood using quantitative real-time reverse transcriptase-polymerase chain reaction to predict recurrence of gastric adenocarcinomaThe distribution of CEA expression level. The ratio means (CEA mRNA/GAPDH mRNA) × 106. Considering the ratio of some patients were zero, we added 0.5 to the ratio.Back to article page