ANPEP and coronary artery disorder: Comparison between serum levels of these biomarkers and extent of obstructive CAD, as estimated by the number of affected vessels (single-vessel vs multivessel, Figure 1A and B), did not reveal differences in APN (9.39±5.76 μg/mL vs 9.26±6.27 μg/mL; P=0.871) or HMW APN (5.29±3.79 vs 5.83±4.04 μg/mL; P=0.306).