CXCL9 and breast cancer: Besides, among CXC chemokines, CXCL9 expression levels were the most highly correlated to B cell (Cor = 0.519, P = 1.78e−68), CD8+ T cell (Cor = 0.543, P = 5.79e−76), CD4+ T cell (Cor = 0.518, P = 4.87e−67), and dendritic cells (Cor = 0.617, P = 4.87e−101) infiltration in BC patients.