Fig. 2From: Plasma Prokineticin 1, a prognostic biomarker in colorectal cancer patients with curative resection: a retrospective cohort studyA box-plot analysis in the concentration of plasma PROK1 in each stage. A box-plot analysis showed that the concentration of PROK1 tended to increase with the advancement of the stage, although the difference was not significant (P = 0.31)Back to article page