ERBB2 and breast cancer: We analyzed normal tissues (n = 291), Basal-like/TNBC (n = 135), HER2-positive (n = 66), Luminal A (n = 415) and luminal B (n = 192) BC from Match TCGA normal and GTEx datasets (http://gepia2.cancer-pku.cn/#index), and observed an elevated expression of HDAC1/2/3 in all BC as compared to normal breast tissues.