Figure 3. Arterial expression of CDKN2A/p16INK4a (A), matrix Gla protein (B) and runt-related transcription factor 2 (C) in arterial biopsies. The vascular biopsies from end-stage renal disease patients were stained with von Kossa and scored by a pathologist as having none, mild, moderate or severe media calcification. P-values represent ANOVA.