By t‐SNE clustering analysis, we identified 11 distinct clusters, including CD4+ T cells (TC) and CD8+ TC, B cell (BC), plasma cell (PC), T helper cells (T helper), fibroblast, mast cells, monocyte, two types of EPCs (EPC_A and EPC_B), and stem cells (SC) (Figure S5c, Supporting Information). Here, CD4 is linked to breast cancer.