CTLA4 and coronary artery disorder: Our results indicated that the frequencies of NKG2A+, CTLA-4+, and PD-1+ cells in the total γδ T cells were significantly lower in CAD patients (Figures 5A, C, D), but the frequencies of Tim-3+ cells in the total γδ T cells were significantly higher in CAD patients compared to healthy individuals (Figure 5B).