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Figure 3 Number of endothelial progenitor cells (EPC) (A and C) and circulating angiogenic cells (CAC) (B and D) isolated from patients without and with significant coronary artery disease (stenosis <70% vs. 70%; A and B), and among patients stratified by maximum coronary stenosis <30%, 30% to 70%, and 70% (C and D), as assessed by coronary angiography.