CD4 and cancer: As depicted in Figure S3, ERBB2 expression was negatively correlated with the infiltration levels of monocytes, M1 macrophages, M2 macrophages, myeloid dendritic cells, cancer-associated fibroblasts, naïve CD4+ T cells, CD8+ T cells, γδT cells, T helper 2 (Th2) cells and B cells but positively correlated with the infiltration levels of M0 macrophages, neutrophils, memory CD4+ T cells and T follicular helper (Tfh) cells in GC.