Fig. 1From: Circulating tumor cells (CTC) and KRAS mutant circulating free DNA (cfDNA) detection in peripheral blood as biomarkers in patients diagnosed with exocrine pancreatic cancerCorrelation of total cfDNA concentration in plasma with PDAC disease stage. *DNA concentration was estimated by the number of copies of the RNaseP gene in 20 μl of cfDNA in plasmaBack to article page