CD31 and CD41 positive MPs were both increased 1.6-fold in CAD patients treated by low pressure ECP (P<0.05), whereas only CD31 positive MPs increased significantly after high pressure ECP (1.95-fold; P<0.05), and the CD41+ increase did not reach statistical significance (1.5-fold; P = 0.078) (Figure 1B and C). Here, PECAM1 is linked to coronary artery disorder.