Among the four investigated monocyte migration markers, CCR2, CX3CR1, CCR5, and CCR1, we strikingly found that the intensities of CCR1 were significantly increased in the M1, M2, and M3 subsets of monocytes in postoperative CAD patients when compared with older controls, as well as with younger controls in terms of M1 and M2 (Figure 1D). Here, CCR2 is linked to coronary artery disorder.